- Garnett beating his chest after a clutch bucket (like in the cover of NBA 2K9)
- Stephen Curry pointing to the sky after making a three:
- LeBron's "neutral" demeanour after a huge basket (he does this sometimes instead of the pushing-the-air-down celebration)
- If you could do a signature celebration after an and-1 dunk it would be Blake Griffin in which he tries to show as little emotion as possible, and also take his mouthguard out
- Tim Duncan's quick jog after making a basket that took quite a bit of effort
- Ray Allen's little point to the bench/crowd after he makes a clutch three
- Bogut's "GOAL!" celebration after a huge dunk or clutch basket:
I think both Gasol brothers do this sometimes as well.
You also need to make celebrations for buzzer-beaters better. There needs to be different ones depending on the status of the player who did it (benchwarmer/star), how difficult the shot was, and how important a game it was.