Probably Silent Hill (1 or 2) or Fatal Frame II.

I can't play both of those games for more than an hour before I get freaked out and shut off the game. :P

I guess it would probably be Marvel vs. Capcom 2 for the Xbox. I bought it off a friend for $5 yesterday. :D It doesn't include the case though, but the game disc is in really good condition.

Bowser from Super Mario.

But if were talking about PC game villains, then it would have to be LeChuck. He is the best evil-undead-demon-zombie-ghost-pirate that ever existed. :)

Dawn of War is pretty intense, to say the least, especially when many armies are battling at the same time.

Just like mostly every other RTS, you build up an army and gather resources, but in Dawn of War, expansion is the key, because if you don't expand your army to other parts of the map, then the other army will and you will be cornered. And yes of course there is online, which is actually pretty fun to play when you have a couple of friends playing. :)

If you plan on getting DoW, I recommend getting the Platinum edition, which includes the original game and two of it's best expansions for the price of about $30. The third expansion, Soulstorm, is about $30 by itself and it isn't that good, the weakest of the 3 expansions, in my opinion. So try to get that one later on when it's price has dropped.

The Beatles - Sgt. Pepper's Lonely Hearts Club Band

Yeah, it's basically the original game, but it adds new modes, one new weapon, enemies, etc.

I would recommend buying it off the Marketplace, since everywhere I looked, stores were selling Ninja Gaiden: Black for $30+.