I've learned alot here from alot of different people, but a few stand out. ProfLogic/Charlie Dow DBPhoenix steve46 Lefty NihabaAshi Edit: Oops! Can't forget acrary.
Marketsurfer - Definately improved my discipline and confidence. I also like Oldtrader, skalpz, nitro, dbphoenix, Marverick74, murray t turtle. Heck, I just like the whole bunch...
In no particular order: riskaverse305 Steve Tvardek Volente Porgie CoolWeb Just to name a few off the top of my head.