I bail when my craft is dead. I don't give a crap about score. (though, I do enjoy stats, comparing certain things)
I fly back to a base after a 40 minute sortie even if I have no kills.
I fly a plane til it's dead.
I don't auger.
I don't ride it in.
I don't/rarely spray my guns while going down or floating arse-first into the ground.
I fly a plane home 2 sectors without oil or radiator.
I don't give a rat's about SCORE, to me it is just part of the immersion/fun. If all you do is run to the fight, HO some tard, and die, rinse & repeat, there's no point in playing AH over FA. Hell, what do we even need gear for? Why not have air spawns in the middle of the furball???
I bail for the same reason I take off and land, for the same reason I take enough fuel to make it home afterwards.
Because if you don't have these things the game is just too arcadish.
Has nothing to do with giving check6s, nothing to do with camping runways, nothing to do with scores (you're down, the kill has been awarded, end of story for me). It has everything to do with immersion, personal preference, and frankly, because I want to, dammit!