I've learned a lot of great things from Tim. Especially simple stuff when I first got started, like rigging my net render so I could queue multiple scenes over night, and camera scenes so I could utilize multiple cameras.
I also learned Expresso almost entirely from Robert leger and Tim Clapham. I utilize expresso in almost every project as the biggest learning curve in 3D is creating projects that are easily edited for client revisions and expresso helps this process.
I've learned a lot of strange nuances like key strokes and workflows of modeling from Chris Schmidt and Pariah Rob.
I've learned how to make simple crap look great from choosing specific lighting by Greyscale Gorilla and Amateur Media.
Lastly, I've learned a lot (although not tutorials) from Reel Roulette. What makes motion look good? Pacing, speed, flow, transitions, colors, DOF, Rack focuses, constant movement, etc. These things can be pinpointed when watching the greats. Like MK12, Stardust, buck, digital kitchen and any variety of artists such as Barton Damer (alreadybeenchewed.tv), LOICA, Dan Difelice (http://thecampagn.com/), and Stephen Fitzgerald
http://mono-motion.com/
It is too vast of a program to learn it all in one place. Every artist will gravitate to teaching their style. Pick one that resonates with you and learn it all. Then forget them, and learn from someone else.