Yeah, systems will be tags as well, since there's some games that have had multiple versions put out in different universal systems or across editions. I've also been leaning on RPGGeek for getting individual RPG mechanics for another set of tags (dice pool, cards, attribute-based, class-based, etc). It's going to be quite a bit of work to actually go through everything, but til now I've just been using alphabetical folders and that's just been tedious and feels too limiting. It's been interesting researching some of the different RPG lines that I don't get as much exposure to and seeing some of the history of RPG games in general and how the hobby has developed over time.