"No." His first loyalty is, has to be, the crew of the starship Enterprise. And as a subset of that, his first priority among the crew is the command crew. Most important of all, his job is to keep Captain Kirk alive, sane, and able to command.

It really doesn't matter what he wants. Not until his tour of duty is done.

"But if I'm here, I'd be mighty displeased if you went to someone else."