If your happy with your station in life, why worry about those who wish to compete? Do your thing, be you, and the rest can go fuck themselves.

The only person you really need to concern yourself with is the guy you work for, and maybe the over all boss. Those two people happy with your performance, everyone else can suck on lemons.

As far as your Dominant personality trait. It's part of who you are. Don't stifle yourself for others. If you do, you're smothering your own personality for the sake of others. Doesn't sound true to yourself to me.