Before I begin my list, I will say that I didn't start playing games until the PS1 and then pretty much dropped vidoe games until my aunt got us a Wii and then I got myself a PS3 (i'm also a Freshman in highschool, so there will be no games on my list that were before the PS1). So, in order of least to most favorite:
5: The TombRaider games (PS1-Don't remember the name, I was seven)
4: Assasin's Creed 1 (PS3)
3: The Conduit (Wii)
2: Monster Hunter 3 (Wii)
1: ALL THE TONY HAWK GAMES, but none of them past the XBox era. The new ones just plain suck.