Everyone defines success differently, as a result, everyone looks at skills a bit differently.
For me success is getting up each time I'm knocked down, so endurance plays a large part, along with a certain amount of stubbornness not to mention pure dogged determination. Patience, persistence, and Perseverance are my motto.
That's not to say that ACM and SA and gunnery are not important, they are.
But for a long healthy AH life, whats important is to find something you can do and enjoy it.
Then over time work on getting better at it.
Doing so in a manner that doesn't take away anything from anyone else, or that promotes teamwork and good fun for others is certainly a bonus.