I only have 2, 'Not gonna play' with 8 games and the default 'Games' section with the rest
Not gonna play contains various games from either bundles or games that have separate entries for linux/mac and windows and the linux/mac entry shows up anyway for some reason (I just checked while counting all the stuff I had in that section and they were all gone so maybe the problem is fixed now), or stuff like L4D2 and Skullgirls Betas.
Every time I try to go where I really wanna be it's already where I am, 'cuz I'm already there XBL, PSN, Steam, Origin, BSN, GFAQs, MC: PhilOnDez
Easily the default "Games" category, because I can't be bothered to sort those into various categories, and most are just games I have/will only ever play once and forget about anyway.
Second to that is probably "Indie Games - M-Z"
Something I split into two categories ages ago when I had like, 30-40 "Indie" games and figured that would be easier. Now there's like, 75 games in each. Edit: Actually, it turns out my "#-L" and "M-Z" categories are within 6 games of each other, and the first has 89...while the second has 83. Uncategorized has 145.
Steam's category system is too convoluted for me to bother changing it.
Edit 2: Well to heck with everything...Broke my Indie categories into 4 branches (#-E, F-L, M-R, and S-Z...Based on current size/popularity). And shuffled a bunch of others around, added a "Third Person Action" game, which ended up getting 41 loose-fill games I didn't have a spot for before, and sorted some others that just never got categorized. Still, Uncategorized is at 95 games. >_>