Very energetic. I made the mistake of purchasing the Betta Bow 2.5 from Aqueon and he had very little room until I could buy a separate tank. My first betta.
He's generally very laid back and is very calm now that's all alone with ton's of room.
Lastly the baby Betta. He's coming along well and never passes on a pellet. I'm very happy with his progress. :-D