I usually play healers and I started out playing a healing sage in SWTOR, but after I hit 50 and actually needed to farm valor and commendations I quickly switched to dps. In PvP healing is the worst way to get medals - unfortunately. The -30% healing in PvP make 5k heals impossible and even if I am allowed to spam by biggest heals without any interrupts - there are several dps classes that can out damage me solo - making healing in PvP a waiste of time unless you are running a premade.
After switching to dps I get 2-3 more medals (easy) and I only wish that I could put guard on something for another 2-3 easy medals. The current PvP state of healing is broke and lame. In PvE it works well, but its boring compared to other games - I had hoped the mechanics where fun - but alas it's WOW 0.5 (due to the fps drops, ability lag, random rubberbanding etc due to the crappy gfx engine it cant even be called 2.0)
But the story is good and I enjoy leveling another character, I just wish I could level a shadow with one of the other classes story so I dont have to level anther consular with the same story - so far it makes no diffrence if I go dark or light story-wise...