A theme is emerging with regard to defining success....fun. It's a game obviously so "fun" is the objective. To change the OP just a bit...how could it be MORE "fun" than it is now?
I have the most fun when I am working with teammates to achieve an objective. Whether it is to capture a base, or defend a base.
Or... when I get in a really good furball, where the teams are evenly matched, and there are planes everywhere.