besides invent krytonite to get even for all the really really bad atomic wedgies you got in school

I would just go on with my life, though I can't lie I would be a little envious of others if I'm the only one without powers.

You would end up like that Bella from the Twilight movies, the most weak, irratating, pointless person alive on the planet.....who everyone happens to want for some reason. Thats what it would be like to be the last human in a world of Kryptonians lmao

I don't know... I guess try to invent armor or something to make me even with them.

Become Batman or die trying..........most likely the latter. Or I would experiment on myself to get powers or die trying.........probably the latter. Maybe I would try to accept and live my life or kill myself due to failure ........................99%chance the latter

Be pretty pissed off.

Hit myself with gamma rays to become the Hulk or try to find Mjolnir and hope I'm worthy to lift it.

become a super villan

An hero. Seriously, comic book hell doesn't even seem that bad.

become a batman and beat-up superman with kryptonite brass knuckles.

I would be a little annoyed, but I would get over it.

Find the nearest cliff or high rise building and jump. You can't fool me, I know I'm Bruce Wayne and that this is a dream within a dream.

Really, I would be living a Hell, depending on how long I was alive for in this scenario but in our comics case it may be indefinitely. And by Hell, I mean the worst and most unique one on the planet, or Universe even if we're being technical and actually involving scripted Kryptonians in this. First, I am now the loneliest and most hopeless person in existence, as you see there's that whole thing about the thoughts and feelings people have where " no one understands them ", " they're the only one that knows what it's like to be them therefore always alone. " ect, yeah? Well, in real life those things aren't actually true. We maintain hope in those situations because the world is vast and we haven't met everyone, so the unknown says to us " there may be someone like me. ". And there is. We're not that rare or unique at the end of the day, at best just due to simple math we fall into categories of lesser or more than what we're not. The second actualization is doing the actual work and searching and researching the facts and assuring yourself there are others, and also, allowing yourself to accept it and be humbled, ei: The greatest lesson in life I ever learned is just to love and be loved in return. But, in this scenario I wouldn't find the light at the end of the tunnel because it's not actually there. I really am the only one in the universe, so there goes the hope as well. The second big problem here: We all read comics of course so we all know how the story goes. There's one thing good or bad that supermen and superwomen do...focus on the non-powered one. I just became the stage prop for every person alive but myself. I'm the victim that gets victimized and needs to be saved, I'm the leverage used against all of the heroic ones, I'm the very measuring stick by which all the super humans weigh their own actions, define themselves towards or against their own humanity and fallibility, and you see where this is going, and it's 24 hours a day. Needless to say as the sole person everyone else's life revolves around and in danger 100% of the time, I'm now living a life, one comparable to that of a football, that doesn't have an equivalent horror to match. Interesting question BTW, more like this. Does The Dude abide?

jump in a vat of toxic waste

@luckydomino1 said:

jump in a vat of toxic waste

This.

I wouldn't know how to live

@HolySerpent: What would you do if you were kryptonian?

Adopt to the social norms since everyone else is a kryptonian, but if i was the only one. I wouldn't be some hero

i would be Charlie Sheen

I would loose my hair and develop ways of destroying these inferior aliens...

Didn't anyone else catch what the OP said? 
He said what if everybody in the world was a Superman.  No woman.
I don't know about you but I don't even want to think about that sausage fest.

Shave my head and start painting rocks green. :P

Either that, or just wait around for somebody who doesn't share Superman's moral code to bust down my door and rip me into an empty sausage casing simply because they can. Wouldn't have to wait long.

@The Poet said:

I would loose my hair and develop ways of destroying these inferior aliens...

Pretty much this.

As someone above said...I'd Become a Batman

Cry.

Espend my entire life trying to get one

try to be someones lois lane

Man that would suck, if everyone was as strong as Superman, then the world would be build accordingly and you would be complety useless and totally handicapped. Maybe i would try to go villian on their ass... somehow, even though that in the comics Superman is atleast a big challenge for even the strongest super villians, so i dont really know what i could do to challenge 7 billion of them.

But think about it, if everyone was ''Superman'' then it would not be super anymore, they would just be ''normal'' and you would be seen as handicapped, just like we see people with muscular dystrophy or paraplegics... just much, much worse, you would be the most handicapped man to have ever lived, you would need help with everything, i mean if everyone could benchpress 500 quadrillion tons and move at the speed of light then every aspect of life would look totally different, would we even use maschines? I mean if Superman choose to use his powers for the building industry he could do the same work in minuts that we could in years.

You would basicly live in a world where everyone moved around at light speed, conqure galaxies in weeks, human society would evolve a million times faster than now, you would be an ant on a planet of 7 billion gods.. You would be forgotten, everything would just flow infront of you without you understanding.

It would be an interesting story actually.

I'm fairly certain I would get a temp job in an ad agency bringing coffee and snacks to the workers, filing paperwork and fixing the copier. I couldn't get fired because my super social worker would threaten them with lawsuits for discrimination. Technically, I'd be special needs.

I would become Lex Luthor, clearly.

I would either become Batman or Lex Luthor. It really would just depend on what side of the bed I woke up on

I become Reed Richards. And sell my inventions to make the lives of all Supermen everywhere better and get filthy rich doing it. XD

Blink them out of existence of course! Superman ain't real! Haha!

Congratulate everyone for their new found powers. I would help them put if I could since there be people that will be nervous of the changes. They would have difficulty with being gentle and although I may be a little clumsy they may need my help. I would be thankful for their understanding that I cannot do their super feats. I will take the Fluttershy approach

@azza04 said:

You would end up like that Bella from the Twilight movies, the most weak, irratating, pointless person alive on the planet.....who everyone happens to want for some reason. Thats what it would be like to be the last human in a world of Kryptonians lmao

@Jotham said:

Be pretty pissed off.

QFT