Fresh 80 Prot Tank... where to go now?
True, tanking is the most resistant to casuals, however, it's not casual "proof". That is part of the reason you had so much grief from healers. Believe me, they see casual (fake) tanks all the time who didn't put in the work you did and it speaks well for you (as a tank) that you did.
My RL friend rolled a dk tank and I would go on my Druid. This let me actually dps for a change Ina random but I could heal if the healer was a jerk. Every time a healer mouthed off, I would reply "it's sad you have all that gear and can't keep up a heroic geared tank in a heroic". That usuaally shut them up but sometimes they would ninja-quit on a pull. No loss since I was there to heal. Don't need that attitude in a group anyways.
"he doens't need healing, he doesn't need healing, he doesn't nee-WHAOSHIT!wtf was that man!". Please stop leaning on TDR. -Teng