-raises hand up-
I have a 10 gallon community tank right now, it's a tad overstocked.
I have eight Rummynose Tetras, one Balloon Molly and my plakat boy. The Rummynose Tetras are a bit big for the tank, they're a tight schooling fish that are quite active, I'm planning to move them to a bigger tank in the coming weeks when I get the tank. My plakat boy is does very good in the community tank, he's a very fast swimmer, due to being a plakat. On the other hand I tried putting my SD boy in first in the community tank, he didn't do very well, kept flaring left to right, so he lives on his own. >:T It really depends on your Betta's temperament, my plakat boy hardly flares, and when he does it's at his own reflection and not at any other fish.