The only thing I dislike about tanking is how you are dependent on you coo-tank. Actually when I was looking for a new guild, it was one of the deciding factors. Thankfully in my new guild, I got some encounters where I got to play around as much as I want. :3 That gave me a way bigger incentive than anything else, to improve myself. <3
Got my first ranking too on Horridon (#81), and more are WIP. :3
I'm still not as good as some here, but I'm getting closer with each reset.