My first main alt was a holy pala. I got abit bored of healing on two characters so tried tanking, but found that it wasn't for me (although I like what a tank "is".) Decided to then level a resto shammy (completely going against what i stopped my pala for) but when i got to 85 and did a few heroics and got some JP & VP gear, i just found it abit....meh.
Deciding i wanted to try melee but not wanting to level another alt, I switched my pala's main to Ret Dps and absolutely love it. Although, like someone mentioned - DPS don't often get into PUG raids, so once again have decided to pick up holy gear whenever I can.