I play Big Team mostly for the lolz, so if you're looking for a competitive team I'm probably not the best choice. I do pretty well in BTB so I'm more than willing to help but I prefer invasion, or at least, I prefer my invasion teammates!
I play with OTHER groups (OcR, etc.) moreso than HWM because they are less organized and they go for more shenanigans. So when we lose I can say, "Well, thats what I get for playing with ______". But when I'm with a full party of HWM tags I can't just roll over and lose. I feel we need to win, AND win with dignity to show everyone just how great our clan is!
So, long story short, I'll play when I'm not invading.