“Don’t just stand there, do something!” Animating background actors calls for both creativity and restraint. Background actors shouldn’t be static, but their animations also shouldn’t distract from the main action.
Here’s a short list of animations that work well for background actors…
-talk_neutral
-talk_neutral_arms_crossed_loop
-talk_neutral_think_loop
-text_loop
-listen_phone
-talk_phone_neutral_loop
-idle_arms_crossed
-listen
-listen_gossip
-idle_smoking
-idle_shift_weight
Don’t feel that you have to limit yourself to this list of animations though. Use any that you’d like, but just use your best judgment when animating background characters!