Feb 8th 2007 3:10PM Played a healing class? 66 Dwarf Priest, at your service.
Holy priests (and Disc priests) can also DPS when they have to. Which is more mana efficient, letting the prot warrior bludgeon that mob to death while it's at %2 and you chuck out a few HoTs; or Shadow Word: Death?
The point is (and the point of the post, I feel): Explore and know what your toon can do, and learn how to do it as well as you can. It's for the win.
There's something bad-ass about seeing a druid shift in the middle of a battle and fulfill two or three roles at once. Or seeing a Pally spamming Holyflashofsomethingorother to save the groups' collective buttocks during one of those "OMG we're toast" moments.