I go for some of the easy/medium difficulty trophies/achievements. Such as collecting all the Blast Shards in InFamous. For the crazy ones, like finishing God of War in less than 5 hours (I found this to be pretty difficult, my fastest playthrough was about 8 hours), I don't really care about.
It's a cool system though, and gives a bit more life to the game.
It's a cool system though, and gives a bit more life to the game.