I too am guilty of bein a classist pig... er catbearcow... I played hunter, mage, warrior, and warlock... none have made it to outlands. Then I took my feral druid straight to 70.
I've since tried levelling other alts... a pally... a shaman... and the one I play most? Another druid :) This one's destined to be my PvP Boomkin char.
I have many in-game friends who say the same thing - once you've experienced the druid class in all its glory, all else pales in comparison.
Different strokes fur different folks tho - play what you enjoy.
My 0.02
-B