Imp:

-Jumps left and right, pointing his pistols in whatever direction he faces

-Glances around

Deadbeard:

-Nothing seems different honestly, it just seems they made his normal standing animation more shakey and lively

Super Brainz:

-Turns his hand into a fist and pumps his down (Like his melee reload animation in the beta build)

-Holds his fists in front of his face and moves around like a boxer

Foot Soldier:

-Throws up his gun while it flips in air before catching it again

-Glances around

Engineer:

-Shakes his gun (like the "get a hold of this" taunt)

-Looks over his shoulders

Scientist:

-Pulls out his teleport button and throws it up in his hand a few times

-Looks up, then forward, then down. Rapid/stiff movements

All-Star:

-Looks over his shoulders

-Does a shorter version of "The Jig" taunt

Citron:

-Stomps a bit and looks around

-Raises his head and looks around

Rose:

-Flips her wand like a baton and sniffs it like a... rose with a jump particle effect/ring around her

-Jumps back and turns a bit

Kernel Corn:

-Looks left and right, pointing a cob buster at the direction he faces

-Couldn't see a second idle animation

Peashooter:

-Looks back and fourth

-Leans back a bit, raising an eyebrow(?)

Chomper:

-Looks right, closes his mouth and shakes his head

-Yawns

Sunflower:

-Looks up and shakes her petals (like the Sunflower spawning animation in the tutorial)

-Looks left and right

Cactus:

-Drifts off to sleep for a moment, before shaking herself awake