Making the transition to PC gaming, any game suggestions?

[Alterego-X]

S.T.A.G.E. said:
One suggestion: Learn to pirate games. Thats the number one key to being a great PC gamer. Free gamers for all PC gamers. They know no law. :)

This. 

Older games are not really bringing significant profit for their publishers anyways, so no one cares if you pirate them.