I would definitely have to say that I can't play favorites as well. Pretty damned hard when you have a bunch of good answers, coming from people who themselves seem fairly intelligent (even capable of constructing a sentence properly!!!).
Josh 2.0
MJ
Mountain Man (Good answers... but damned funny)
TahoeJoe
BearCrap
WOP2_99
Akluis (generally speaking)
VLD
The Long Shot
Butch (when he was on here)
DumDum
Randy
And of course all the various little cane toads... our slimy, ballistically inclined, amphibious friends that have brought much joy to my own life, and the lives of many others... (inside joke, but you'll catch onto it rather quickly)
Edit: I remember Annie... nice kid, and really knew her stuff. Pretty surprising that she knew what she did, being as young as she was.