I think my new little red betta Archimedes has OCD! He likes to do the "limbo" under an overhanging plant leaf at the front of his tank. To fit between it and the gravel, he has to flip (and swim) entirely sideways. He doesn't let any part of him touch either the plant, or the gravel. He will go around and around the leaf up to twenty times in a row! I wish I could videotape it. He seems healthy, exuberant, and very active overall.
Are there other bettas out there with odd or interesting behaviors?