I love tanking. I almost always tank in group content and on the rare occasions that I don't, I usually heal. That being said, the biggest turn off from tanking/healing for me is not the tank changes or the shiny new SB dps classes or mechanics in any of the dungeons. It's the people I get stuck with in DF. Probably 95% of the time most of my groups are fine or even pleasant, but that other 5% is a swirling hellhole of toxicity that drives me to lose all faith in humanity. I really don't understand the reasoning of people who wait in the queue for nearly an hour just to spend 20-30 minutes treating everyone in their group like shit. And it's most often directed at the tank and/or healer. If a tank pulls too much or too little, goes too fast or too slow, skips something or doesn't skip it; you know you are going to catch hell for it.

Most of the time I just suck it up and deal with it because after tanking in various MMOs for the last ten years or so, I'm pretty desensitized. But some days are just particularly bad and reach a point where I frankly just don't want to deal with other people's shit. That's when I go and play my RDM.