The one who has better or more enjoyable healing abilities.
I always play a female character when possible. I guess the reason is that my father played a female undead in WoW. So yeah, you learn from your...
I guess for PvE it would be ok to have acces to both factions. But on PvP server certainly no.
I play healer/support in every game I play so once again, I will be a healer. Offspec RDPS i guess.