I've been playing a lot of that Hidden : Source mod recently (no, not because of Seananners, I just kind of stumbled upon it at another forum I frequent and gave it a whirl). It's such a deceptively enjoyable little mod... basic as they come but insanely fun and addictive - I'm putting in a few hours every night now, and I haven't really been playing games for a long time now, so that's no small feat.
I actually like all of the little quirks and bugs - I have a strange feeling that Beta 5 (when it eventually comes out) will probably change the game so much that it'll destroy the charm it has right now. All they need to do is fix the random crashes when you die, update the visuals a bit, and add some more weapon variety and hidden 'skills'.
Have about a million games backlogged. Think I might do Bioshock 2 then Infinite shortly as I really want to, then DiRT 2 and 3, and who knows what after that.