I gave $100 to DF, would've been a bit more if I was more into graphic adventure games. However, I love DF, love the work they are doing today, and wanted to support them.
I gave $100 to Wasteland 2, would've been a bit more if I had a bit more faith in the modern output of the developers. I may up it a bit before the month is out, particularly if I have confidence it is Wasteland 2 and not Fallout 2.5 -- or Fallout 4. Keep it turn-based, party-based, third person, wide in scope and choices and consequences and I'm in for more.
I'd also gladly give $100+ to works derived from, inspired by, whatever Seven Cities of Gold, Adventure Construction Set, and Starflight.
I'd give at least $1000 to a new Ultima, in the style of Ultima IV - VI (The Age of Enlightenment). Sadly, however, EA is using that license in several ways currently and there's no way it'll get back to Richard Garriott (and I doubt he really wants to do it anyhow).
Oh, and Roadwar 2000 -- would love to see a version of that!