I, too, play both sides!
My 50 Sith Assassin will forever be my main, near 'n dear but somedays you just need a break from the brutal beating of the 50s brackets and a change of pace in storyline should PVE strike your fancy for the moment.
I've got a level 10 Consular on my same server but have yet to dive into PVP as a healer, whereas I've always played hybrid tank/dps roles.
It keeps things fresh.