AV: take and defend a tower until it burns. it's guaranteed honor when you burn a tower.

EotS: take and defend enclosed area like Maage Tower or Blood Elf. Fire Nova wins in there.

AB: I like playing offense and roam to areas that are least defended. By the time I get there, my EM-NS-CL is up to get me some kills.

WSG: I've done the defense sitting on the flag with a forest of totems. If you have a good flag runner, I come out and support with frost shocks, staggered totems and pick off loners with EM-NS-CL.

I also tend to only play BG when it's the weekend bonus. And play 5-man faction farming otherwise.

It's about time efficiency. You either have time to honor, arena, badges, gold (daily), some blue drops, or reps (and even tradeskills)--not many overlap.