I tried to limit my addiction to legion-class only, and each figure must fit into a balanced grouping of alike-figures, with minimal mold clones and ignoring really crappy ones. It's been... frustrating. I've happily blended continuities but tried to get only one figure for each character, with the exception of characters that are vastly different (eg. I have a movie "Jetfire" and a G1 "Skyfire".) I've also tried to focus on adding female characters, usually by customising, and I'll ignore characters that don't appear in multiple mediums (eg. needs to be in a cartoon or movie or game and not just a toyline.)