I tend to go after trophies, but never really look at a trophy list before I purchase a game. If I'm interested in a game trophies don't really change my mind. I don't purchase or rent games with easy trophies, just for easy trophies, I simply try to complete as much of each game I play as I can.
Heh, Arthur tell us how you really feel eh? I've found that trophies make me more willing to explore the nooks and crannies of games that otherwise I would be interested in doing, but lacked motivation to do so. Trophies even though they don't really mean much gave me that motivation. I don't care that much about the number, but I do like the challenge (for some games) and the little extra motivation to complete aspects of the game that I might have just skipped over and moved on to the next game.