For me the members that stand out are MolaKule, Clevy, Char Baby, Overkill, Shannow, Garak, Drew99GT, SteveSRT8, SLCraig, mechanicx (although I don't think he posts here anymore), Trav, JHZR2, PandaBear, The Critic.
I enjoy posts from all members, except for the obvious trolls that like to waste everyone's time.