I quite enjoy them, myself
I love how much they are capable of. Mine is currently learning how to jump out of the water and grab food about an inch above the surface. It's incredibly amusing to watch.
My betta is very aggressive though. He flares at almost everything. Hmm, just the nature of the beast I guess.
I keep him in a filtered/ heated 5 gal. aquarium and he seems very happy there. I recently got some driftwood off of a local beach that I am curing so it can be used in my aquarium.
So, anybody else have a betta fish friend?