I personally don't understand tanks who rage for any reason. Do i get frustrated, sure. Do I encounter terrible groups that I eventually leave, sure. Do I freak out at said group prior to leaving, never.

A typical Amdapor Keep run with Zoomie:

Experienced group? Awesome, I have macros that explain my "challenge" mode on all bosses. We're about to have a great time.

Inexperienced group? Also awesome, welcome to AK. I ALSO have macros that explain each fight. Please listen up and I will show you how AK is supposed to go.

I mark everything ALL THE TIME, its my job, why wouldn't I? I chain pull all the time unless someone needs MP, expediency is golden.

My job as the tank is so facilitate the cleanest, fastest, funnest run possible. Meanwhile I tell random, funny, outlandish stories while tanking bosses if I have time, lol.

Long story short: I love tanking, you will love me being your tank, we're gonna have a good time.