I'd have to say Mithos from Tales of Symphonia. I love that they actually had him infiltrate the party and observe them for further insight, and then for him to even find a friendship with one of the characters, causing even more conflict when one eventually faces him down. Not to mention his presence is virtually everywhere once he first shows up in the game, there's always the feeling that he's lurking and watching.
I'd also have to say Miraak for a second. While not with quite as much of an impact as Mithos, he also makes his presence known very well, especially when he just shows up and steals the soul of a dragon you just killed. The final showdown with him was very satisfying as well.
Tough decision, but I think I would have to say my favorite is Vaati from the LoZ series. I don't know what it was about him, but I just really liked him. His character design, the way he interacted, it all appealed to me. The depressing part is he had no role in the plot of any of the other games other than Minish Cap, which basically made him one of the most unimportant main villians of the games haha. I still love him though!
Dorongo, I swear, you come up with the best gaming threads.
Anyway, on to my response. As of now, my favorite villain is Raul Menendez from Call of Duty: Black Ops 2. He is just so intelligent. Half the events you go through in the game were set up ages ago by this guy. He's one step ahead of you every moment and just when you think you have him cornered. He jumps-jumps-double-jumps and is in your back row.
On top of that, he holds a grudge for more than 30 years and hurts your characters heart and mental state multiple times. Truly a master of manipulation.
Catalyst from Mass Effect 3, yes really! He is one of my favorites because he is intelligent. He can understand possibilities that Crucible has. He is ready to make compromises when his plan seems to break, and even gives choice to be destroyed or taken over by hero, because they would replace his now unworkable solution.
These, plus Sephiroth from Final Fantasy VII. I know, he
killed Aerith, which pissed me off a bit.
Wasn't that supposed to be Jenova who looked like Sephiroth? At least that's what I've heard. Sephiroth doesn't appear until very late in the game.
Kefka from FF6: he plays the role of a villain very well, even though he makes himself rare at the last third of the game... Golbez from FF4: he doesn't give the heroes much time to breath, since he seems to be right behind them all the time
Favourite villain huh... Tough choice... Im terrible at choosing. id say Bob Page from the original Deus Ex... (oh spoilers maybe): He practicaly made everything in the game happen...including you. Also he has wealth, technology attitude and a slick suit. Oh and awesome music at his final base. :D
Also I like Kefka and other mad clowns equaly as much. You know...because clowns.
Also Eggman or Robotnik has in my opinion some very diabolical plans. Sad that he usualy makes some poor decisions with them.
Oh and one villain I kinda like that many might not know. the main villain from Witcher. Jaque something I guess was his name. He is just...Interesting villain.
Oh and every major villain in Phoenix Wright series.
And of course Yomiel from Phantom Detective. (Seriously awesome game/villain)
Also Known As: Call me what you like. A good nickname is always appriciated. ;D
One of my favourite villains is The Apostle of Creation, from the sadly unappreciated Star Ocean: The Last Hope. Whilst this game had its ups and downs in terms of character development, I felt that his was particularly well-handled, and whilst its questionable as to whether or not he was really a villain or just a victim of tragic circumstances, considering the game was filled with world-shattering (often quite literally) moments of tragedy, I think that gives his appearance as a villain that much weight.
Gotta go with Luther Lansfeld from Star Ocean: Till The End Of Time. He programs an entire huge MMO universe and then goes crazy as he tries to understand how his creations have become self-aware. Even though he doesn't show up until very late in the story, I like the way he was handled as being the final boss. Technically he's the God of the Star Ocean universe, so having him as the final boss put a very nice ending to the series timeline.
Also Handsome Jack from Borderlands 2 because all of his dialogue is great and I keep playing for the sole purpose of listening to him.
Laser Man from Mega Man Battle Network 4 is one of my favorite villains. He has a super armor, so he never flinches when attacked by weapons like Vulcan and Air Hockey. His primary attack is Cross Laser, which strikes whatever panel that you're standing on. It rarely misses. In order to beat him, you have to use plenty of recovery chips and stay alive for as long as possible. Demise from Legend of Zelda: Skyward Sword is my favorite villain, too. He has the perfect looks for a villain, he's the source of all monsters, and he was very hard to beat. GLaDOS from Portal, Bowser from Super Mario, Psycho Mantis from Metal Gear, and Wesker from Resident Evil are also my favorites.
Villains have always been my favorite characters from video games. Whether they be extremely cryptic and sly, or downright malicious, or even shy yet cruel, their personalities and designs never fail to intrigue me. One that I've always held close to my heart is Skull Kid from Legend of Zelda: Majora's Mask. His character is impeccable; the story of a troubled child and an enchanted horrifying mask that is seeking to take everything over. A positively wondrous evil plot, if you ask me. Fawful from Mario & Luigi: Superstar Saga is also one of my favorites. As well as those two, I'm a big fan of the more classic villains such as Bowser, and even Ghetsis from Pokemon! Villains add a flavor to games that nothing else does, and without them playing through one would be stale and boring.