While I don't see myself eye to eye with this individual all the time, I have to say DualShock is one of the best 12ers. I read a rant thread he made about a week before I joined in about how poorly run WF was. Motherfucker dropped a pipebomb a la CM Punk about all the glitches, unfairness, etc. in this site.
Rock316AE is clearly my favorite of this generation, but that's probably biased since I am an Attitude Era mark like him.
Bad Blood. Nuff said.
As for the worst, I find Sheamus to be a dick rider, revolversnake having shot himself in the foot with the BB thread (which was hilarious), and NOYK truly being a cry baby like what Catalonotto or whatever he is called says, it's something I have noticed among Randy Orton marks.