First things first. Thank you for the fun topic!

If you prefer CBJ, do you allow ball licking?
Ball licking is always encouraged in my book

TUMA?
I haven't experienced it, and I'm not too curious about it, but maybe if a girl gets me horny enough.

is CBJ a deciding factor if a provider offers both bbbj and CBJ, is that a deal breaker and you only want CBJ providers?
Not a deciding factor for me at all.

Gentlemen, roughly how much harder is it to achieve and how much longer does it take? does CBJ effect the ending?
On CBJ I get to desensitized got reach climax so I don't enjoy as much (especially if the condom is put on with the foreskin covering the head). The visual is still pretty exciting regardless. CFS, It's just the right amount of desensitization to help me enjoy the full experience.

if a woman you really wanted to see only offered CBJ, would you consider seeing her anyway or is CBJ only a deal breaker?
It wouldn't be a deal breaker but she would be moved down on my TDL.