More ... generally speaking again, if you dont care about RTB, you dont care much about fuel (using instead the drop tank + 25% fuel "technique"), you dont care about higher dots coming from enemy bases, you dont care if your next kill means a death, you (probably) care less about your wingie. You get the more kills you can, *inside the furball*, not caring about any "windows" to disengage. I have seen exceptional furballers getting many kills staying *into* the ball for all the time, not caring about exit strategy and finally getting shot down, kudos to them.
Just the opposite if you do care about RTB: you have an (average) fuel load higher than your opponents, you disangage (and reposition) more often, you need a faster a/c, you have to modify all the fight in order to get out and RTB. Its all a different strategy.
Both are interesting, I for one like to get back just to feel that a mission has been accomplished. But its only my opinion.