Picked up Counter-Strike: GO again, and started actually playing the classic competitive mode only to suddenly find that it's actually fun as hell, especially with a team that uses mics and coordinates. Didn't expect that to be honest, but the whole 5v5 format works really really well for the game.

And as a side note, all of the weapon skins and cases that get dropped in that game are readily salable on the Steam marketplace and I've actually made a few bucks as a result.