On the one hand, I love hearing Jester talk in these videos. On the other hand, I hate some of the the things he says and some of the triggers that appear to be activating him!
I've commented before about brevity, and HB have responded to say that they've exercised some creative license here.
While I kind of understand that, there are some brevity terms that are written in blood and so ingrained as to be immutable: so, where Jester says "Watch your height", or "Shit, shit, shit, shit!", in reality he would instinctively say "Height!" (because one word is better than three when you're pointing at the ground!). I just hope that the balance is more towards the realistic side of the spectrum.
As for the voice acting and the tone, I hope that it reflects the phase of the mission. Lighthearted during transitional and administrative phases, and professional during the combat or critical phases of flight. We'll see...