I have the modded Soundtank Tube Screamer given out a couple month's ago in the gear-monkey contest. I also have a stock Ibby Soundtank 60's Fuzz I like.
Oddly, my fave is a distortion pedal that most people seem to hate, a DOD Supra Distortion:
The trick with it is to leave it at the bassiest tone setting and only turn the gain up a little bit.