Name your favorite Spider-Man villain(s). Doesn't matter if they have appeared in a movie or not yet.

Sandman

Kraven

Lizard

Electro

Shocker

Puma (though I don't consider him a villain)

• Venom (Eddie Brock)
• Kraven
• Electro
• Scorpion
• Chameleon

The Spiderman doppelganger. He wasn't in many issues.

Doctor Octopus

Sandman

Scorpion

Green Goblin

Electro

Green Goblin

Doctor Octopus

Venom

Lizard

Sandman

Kraven the Hunter

Vulture

Rhino

Electro

Shocker

Mysterio

Black Cat

Scorpion

Carnage
Demogoblin
Electro
Mac Gargan
Rhino

Green Goblin (Norman Osborn)

Venom (Eddie Brock)

Carnage

Kingpin

Electro

Venom (Eddie Brock)  

Carnage

Doctor Octopus  

Electro    

Mr. Negative

J. Jonah Jameson
 
Green Goblin  (Norman)
 
Lizard   

Electro
 
Venom (Eddie)
 
Black Cat (though I don't consider her a villain per say)
 
Kraven the Hunter

Doctor Octopus
 
Scorpion
 
Chameleon

Lizard 
Chameleon  
Kraven 
Electro  
Mysterio  
Hob Goblin 
Kingpin  
Rhino 

Every villain introduced in the first 20 issues minus Kraven who I never cared for but plus Hobgoblin and Venom. Top three are Doc Ock, Venom and Hobby in that order. 

All the Goblins, but Osborn and the current Hobgoblin in particular.

Also Venom, Carnage, Doc Ock, the Kraven clan, Lizard, Scorpion, Mr. Negative, Kingpin, and Mysterio

In my mind, no one will ever top Eddie Brock's Venom. Especially considering he was pretty much THE only villain created entirely by spiderman, and that he has gone on to spawn a god damn legion of other spiderman bads. Seriously, the amount of trouble the Venom symbiote's caused for spiderman is nigh endless.

@nadral said:

In my mind, no one will ever top Eddie Brock's Venom. Especially considering he was pretty much THE only villain created entirely by spiderman, and that he has gone on to spawn a god damn legion of other spiderman bads. Seriously, the amount of trouble the Venom symbiote's caused for spiderman is nigh endless.

Quite true, although he has arguably lost more to the Goblin (i.e. Gwen Stacey) than he has to Venom. I love all the symbiotes though, and I love that Venom and Carnage, etc, are the arch-enemy's of his that mostly came about within my life-time. Most of his other (main) bad guys are much older.

@IrishX: Ditto x]

• Carnage
• Venom
• Doctor Octopus
• Rhino
• Hobgoblin
• Shocker
• Lizard
  

Venom (Brock) 
Kraven (Sergei Kravinoff ) 
Green Goblin (Osborn)
Vermin 
Smythe and his Spider Slayers  
Morlun

Carnage and Venom. Symbiote power!

The symbiotic villains and the Green Goblin. Who doesn't love the insanity that is Norman Osborn? One of my favorite depictions was just after Civil War, when Osborn was leading the Thunderbolts. His descent into madness was a macabre pleasure.

@fodigg: Good choices. I think the spider-slayers are underrated. :]

Venom( Eddie Brock)

Carnage  
Mysterio
Doctor Octopus 
Morlun 

Black Cat
Venom
Carnage

1. Scorpion
2. Beetle (though now he's a good guy)
3. Electro
4. Mysterio
5. Venom
6. Hobgoblin
7. Dr. Octopus
8. Sandman
9. Rhino
10. Shocker

Venom 
Carnage 
Electro 
Doctor Octopus 
The Lizard 
Green Goblin 
Hob Goblin 
Scorpion

Venom, Black Cat, Jack O' Lantern, The Thousand, White Rabbit, Scream, Doppleganger, 8-Ball, Calypso, Cardiac, Carrion, Demogoblin, The Chameleon, Mysterio, Black Tarantula, and Kaine (noting some of these switch sides)

• Green Goblin
• Dr. Octopus
• Electro
• Rhino
• Kraven
  

Carnage
 
Green goblin/hob goblin both of them.
 
venom
 
electro

Lizard  
Shocker 
Green Goblin (From the Ultimate Spider-man series)

1. Eddie Brock (Venom)
2. Black Cat
3. Rhino
4. Carnage
   

Green Goblin  
Venom   
Doc Ock  
Carnage 
Mysterio

Sandman 
Original Hobgoblin 
Black Cat

Eddie Brock Venom  
Deadpool 

In approximate order:
1. Kingpin 
2. The Lizard
3. Venom 
4. Carnage 
5. Doc Ock
6. Chameleon
7. Green Goblin
8. Hobgoblin
9. Electro

In no order:

Vulture

Electro

Mysterio

Lizard

Doc Ock

Green Goblin

Sandman

Rhino

1. Hobgoblin (Kingsley)

2. Black Tarantula (both)

3. Morlun

4. Mysterio (Beck)

Green Goblin

Doctor Octopus

Mysterio

Electro

Hobgoblin/Goblin Knight /Goblin King (Phil Urich)

Sandman

Chameleon

Mister Negitive

Venom

Anti-Venom

Individuals (Not in any particular order):

• Norman Osborn/Green Goblin
• Otto Octavius/Doctor Octopus
• Quentin Beck/Mysterio
• Aleksei Sytsevich/Rhino
• Eddie Brock/Venom
• Martin Li/Mister Negative
• Felicia Hardy/Black Cat
• Herman Schultz/Shocker
• Morlun

Teams (Not in any particular order):

• Sinister Six
• Superior Foes

My favorite Spider-Man villain is Mysterio because his costume is cool, and he has no actual superhuman abilities or fighting prowess. He is just a master at making illusions, and he can nullify Spidey's spider sense, which Tony Stark could not even figure out (because he didn't know). Mysterio has outsmarted and toyed (pause) with Spider-Man on a number of occasions, and has had some interesting stories over the years. If you have not played the game Spider-Man: Shattered Dimensions, do yourself a favor and play it, it is quite possibly the greatest Spider-Man game thus far. Mysterio is the main antagonist and final boss in that game, he sets the whole story in motion. I just do not understand why he is so underrated.