When SC2 was released, I got into it big time as well. I know I have an addictive personality (if given the right method and circumstance), but I didn't know the term 'rage to master' I'll have to look it up.
Anyway, I slept and breath SC2. I knew it was going to get me in trouble, I had no delusions of going Pro, but I just wanted to be good. I hated the feeling of losing to cheese tactics and winnings games, surprisingly, only gave me a mild high. If I won, I wanted to be a legit win. SC2 to me is chess on steroids. I'd kept playing no matter if I won or lost.
I was aware of my personality flaw so I gave myself a goal – Plat #1 on my division and I'm done. So I reached the goal and immediately quit the ladder game. My ability to do this made me doubt if I really had an addictive personality. I find myself going through the same process for other games such as WoW and D3 – aim for the highest (reasonable) goal, 'prove' something to myself and be done.
It's really unfortunate, since I rarely play games for the sake of 'fun' anymore (any online game bring out the competitiveness in me.) Just like the Matrix guy, I don't see them as games anymore, I see them as ways to min/max, look for exploits, efficiency, risks vs rewards, mathematical equations.