That is the thing that irks me about the X-Men comics sometimes. The Mutant gene sometimes gives you powers, sometimes makes you look like a freak, and sometimes both. But what about the other Marvel characters that have powers that weren't affected by genes? I am pretty sure there are some characters that have similar powers, but one of them is a Mutant (and I'd need help with that. I was going to suggest Firestorm/Human Torch, but...).
What do you guys think? Are X-Books big and good enough to be their own universe?