Opponent has a full stack and is running at 65/3 over 80 hands or so.

1. I raise to $4 UTG with [As] and BB calls.
2. Flop [3s][2s], pot $8. I lead $7 and donk min-raises me to $14.

Do we 3-bet here or call?

Not a very difficult spot or anything, I just don't have enough experience to know whether these players usually stack off with a 9 if I 3-bet him to $42.

i like a small 3bet here. makes it super-easy to get all in on turn + river. make it $25 or so and the hand will play itself out.