Sometimes. I go for trophies I think I'll actually enjoy getting, and if all of them are like that, then sure. I don't obsess over it, though. Like I certainly wasn't going to collect all of those blast shards in InFamous.

I've gotten the platinum trophies in Sonic's Ultimate Genesis Collection, Prince of Persia '08, Bayonetta, The Saboteur, and Assassin's Creed II. According to my trophy list, I've also gotten 100% in Blue Toad Murder Files, Gunstar Heroes, Critter Crunch (back before the easy patch :P), PixelJunk Shooter, Linger in Shadows, Echochrome, and Noby Noby Boy.

Apparently I also have 0% of the trophies in six games. :P I wish I could remove those.