In regards to recommendations:
-Indie
-Arcade
-Action
-Difficult
-Casual
Are what it suggests based on my system, so far. Not bad. Kinda wish there were more games that were rated along some of my other tags, like Trippy, Psychedelic, Fun Boss Fights, Addictive, Great Soundtrack, and so on. Still got more games to tag, but it's a good start. Hope my suggested tags help out.
Procedural Death Labyrinth and Music-Generated Levels and such are also pretty good tags. Especially the former. That cracked me up.
EDIT:
Steam Workshop Needed would be a good tag to use for games that would work excellently with it, but don't have it yet. Games like that would include Super Laser Racer (Saw some neat maps others made, but I lack the ability to get/submit them (I made a map I call "Braids of Death". Lots of braiding road, especially made for combat, than racing. SO much offroading), and Needs UDK Released could apply for games where user-modding would be awesome, but it lacks a means to do so (inMomentum is a game that could use some user-made contributions; ranging from freerunning playgrounds, and others made for racing through, or maximizing game exploitibility (like a 300+ kph ninja jump across a level, but in case you can't there's a more user-friendly path to take; Levels with a Tron-like design scheme would also look cool as hell.); tagging as a suggestion. While on that note, for games that may or may not have it yet, Oculus Support Demanded could also help, since Oculus and Oculus Supported already exist.