I've only Platinumed (I think) Guacamelee! and inFamous Second Son, although I've 100% a ton of games (most on PC or earlier consoles without trophies/achievements).
For the Plats though, they were both tons of fun getting. Guacamelee! was I suppose the most tedious since it's still pretty much the same game on hard mode, and going around getting certain things took a long time. Also a room full of the electric/tornado guys on hard is so annoying. inFamous was super fun, by my second (evil) playthrough, even though it was on expert I was much better at the game that time around so I actually found it easier, and I already collected everything the first time around so I didn't need to worry about anything but blast shards. And the game is actually a little different on evil than on good, so there was new content/story to experience. Also, dat evil ending. sooooogood.jpg