Friendly Hand Gestures:

Thumbs Up (featured)
Hand Shake
A-Okay or the Old Pepper Kid
Blow a Kiss

Salutations

Side to side wave
Open/Close wave
Finger Roll wave
Royalty Wave (fingers together, slight turning of wrist)

Celebratory Hand Gestures

Clapping
High Five
Fist Pump
Arsenio Hall Circular Fist Pump

Miscellaneous:

Metal! (featured)
Tomahawk (Atlanta Braves)
Websiiiiite(featured)
Peace
Blog (featured)
Hang Loose
Jazz Hands
Air Quotes
So-So
Fingers Crossed
Point
Poke
I'm Watching You
Pinky Swear
Snap
I can't hear you (Hulk Hogan)
Wanna Fight (featured)
Time Out (featured)

Obscene Gestures

The Finger
The Fingers
The Fists ('The Finger' from Friends)