way way way too many to even think about a favourite. I've got about 400 acid techno sets on my hard drive, it's kind of dificult to narrow it down.
got to say, still love the havok mix from Acid Trash, it's banging. some of the recent DDR mixes have been outstanding, and also the Chris Liberator/Sterling Moss mix posted recently is both in the stereo at work and in my car, cos it knows how to have it. Mobile dogwash sets are cool, though usually rather short ( around 78 minutes fits the CD nicely btw fellas)
I could go on (and on and on and on)