I think I'll pick Blackwell up, even if they're short. Adventure is the one genre I try to never miss. Although I actually never played the last Monkey Island game (in however many episodes), to my dying shame. I kind o got sick of Telltale's 3D adventure games, because they're always so goddamn easy and linear.
King's Quest 6 is one of my best game memories of all time, and if you can get the version with voice acting I'd totally recommend it. The free online remakes of King's Quest I-III are also really good and professional, because in their original EGA version those games are fucking impossible to play and brutally hard (the remake of II was particularly good). Although if you were to go back now to play a classic adventure game I would acually recommend Gabriel Knight instead, because it kicks all kinds of ass and has Tim Curry and Worf as voice actors (while the actors who played Worf, not actually Worf). I played them on gog.com, although if your unscrupulous I'm sure you could easily "aquire" them elsewhere (there are three games, 1 is the best, 2 is an FMV game but actually still really good, and 3 is...well we don't talk about 3). In the first game you're a smarmy Cajun in New Orleans hunting a Vodoun death cult. What more do you even want?
Also, I'm pretty sure you need to recommend an RPG on Steam, because OTRSPOD (or whatever the fuck the acronym even is -- the PA games!) have whetted my appetite for an old school RPG, but aren't good enough on their own to satisfy it. Don't say you don't know any. I know you're holding out on me.
Should I have played the Blackwell games? I thought you didn't even like adventure games. You once committed the rank heresy of saying you hadn't played King's Quest (or that it was boring, I forget, but both are unacceptable).