Out of DRM paranoia (before I discovered GOG) I used to have a separate Steam account for each game franchise and a Google Spreadsheet to keep track of them. About 15 accounts (yes yes, I don't own that many Steam games, luckily I discovered GOG before I ended up buying too many Steam games). Would be neat if I could finally collapse them now that most of my games are on GOG (including having rebought games I had on Steam that I actually care to really own).