I vote for amber-shaper.
I don't like him, he doesn't like me. I have gotten into a vehicle a grand total of 1 of all of our like 40 tries(wipes or kills), while getting the healing debuff about 50% of the time. That debuff also makes it so that I cannot use nature's vigil, which would be my preferred talent on a fight like that.
And then the driving itself.... pff.... I know I can do it with no issues. He just decides to give it to anybody else. (Have never failed and never will looking at the amount of times I have been a construct).
I didn't hate sha that much tbh. I found it to be quite fun as a dps. As a tank however it seems boring.
I had a revelation about tsulong when healing him on my shammy. Best fight by far. Beautiful. How everything matches with shaman abilities (my alt).
But when being on main I am not sure about my favorite. I liked most of them.