No betta, but several of my fish have their own silly habits.
My dwarf gourami likes to follow a finger up and down the side of the tank..for about 30 seconds, then he'll back up and charge the tank head on,
fins flaring and end up making a "popping" noise against the side of the tank--like he's kissing it explosively.
One of my cory will come up and nuzzle my hand while I'm cleaning, and if I leave a space between my palm and the gravel vac, he'll try to snuggle into it. Silly thing's nearly gotten his fins snipped when I'm pruning plants! When I first got him, I transferred him (or is it a her? haven't figured that out yet) in the palm of my hand. The other corys zipped off as soon as I lowered my hand into the water, this one just sat there and wriggled till I dumped him out.
Of our five oto's, one is addicted to doing barrel rolls thru the hollowed out center of the zuchini slices I put in several times a week. It'll come up, start nibbling along the rind, then dash off, turn around, and come dashing back cutting straight thru the open center of the slice, doing one complete roll as it goes thru. Fish are weird.
