Admiring Holk's guide collection from over here, I've picked a few up for games as I play them. They can get pretty expensive second hand, so I don't even try to collect them. Many times the guides end up being worth more than the game it's self.
I do, however, collect roleplaying games in general, everything from NES to 360. Last time I tallied everything up it was around 600 different titles. Mostly my games are in English, I do have Tales of Phantasia (just saying since Holk's got the two guides there) for PSX, there's a translation patch out, so I bought it to rip a copy of the ISO and play the patch.