I'm just curious why you picked your main?
My wife picked a Draenei Fury Warrior for her first character and has stuck with it ever since (has a couple alts she slowly levels but sticks to her warrior). She just enjoys charging and leaping into fights with reckless abandon.
Right now my main is my Gnome Frost DK (although I change mains fairly often). Tried a few times to level a DK and could never do it till I rolled Gnome, just love the little wrecking ball. Also my guild needs Tanks more than healers (I'd prefer to heal but we have a ton of healers already), so having a tanking OS is handy and probably the reason I jump on my DK for most of my guild's group content.