It's a game of roulette with two options: Bumblebee is either really humble and shy about it, and usually tries to deflect (e.g. "Aw, it was nothing") or he inexplicably believes the other person is joking or not being genuine and he will just give a polite thanks before fixating on the compliment for a while.
Bumblebee does not take criticism well. He takes everything -- even very minor critiques -- to heart and being scolded can absolutely kill his mood for days.
📍- They narrowly escape a perilous situation
Usually Bumblebee will try to laugh it off or downplay how perilous things actually were. A lot of the situations are due to his own recklessness, however, so he will usually either be praised or scolded depending on how well things worked out in the end. See above.
🚪- They hear someone knock on their door
His immediate instinct is to be on high alert, but Bumblebee is known for having his door always metaphorically open. He usually invites someone in before confirming their identity (it's okay though because everyone knows Decepticons don't knock)