The game I think that will always be most memorable for me was the original Tomb Raider on the PS1. I just couldn't put it down. The atmosphere was great and I'm hoping Legend can repeat that. The last three were rubbish IMO, especially Angel of Darkness, which has to be a contender for *worst* game.
Role-played characters:
daedalus - Liberty Navy
bandersnatch - Ruthless criminal possessed by a (huge) alien
Shredder - Small-time Kusari pirate, looking to join the Blood Dragons
"Bounty Hunters. We don't need that scum." - Admiral Piett