RealGM

I'll start with Dirk

FAV GAME: Game 7, 2006 WC Semis
Dirk scores 37 points and 15 rebounds vs Tim Duncan, among them a crucial three point play, when the Mavs were down by 3 with only 20s to go.

WORST GAME: Game 6, 2007 1st round
Dirk literally implodes vs the Ws, scoring only 8 points on S-Jax after a stellar regular season. Excruciating to witness.

Kobe

FAV GAME: 81
I think this one is self explanatory - rarely do you see a player exert his will on a game and completely take it over.

WORST GAME: Game 5, 2004 Finals
24pts on 33% shooting. Hell, any of the games in that series...Payton and Malone were nonfactors and Kobe tried to take over...only Prince completely shut him down.

Gilbert Arenas:

WORST: Arenas stinks it up in a game versus Portland that he predicted the Wizards would win and in which he would drop 50 points.

BEST: Wizards vs. Suns, Arenas sets his career high in points and leads the team to victory over the hottest team in the league breaking the Suns impressive win streak.

Runner Up: The Game Winner vs. MIL. Hands in the air and back to the basket walking to midcourt as soon as the ball leaves his hands before the final buzzer goes off.