Lipo.....because i am a lazy racer
the only maintenance i do on my car between races now is to either mend it or re-adjust the camber, or i might change the tyres if the ones i have on stop gripping.
I run brushless so i dont have to skim, and i run lipos because i dont have to be
particularly careful charging them (obviously i follow manufacturers recommendations) or nursing them to keep them in tip top condition....just balance charge 'em and race 'em. no difference in performance from race to race.
super.