I'm just fascinated with it . . . they're all so different! For example, Promise, my crowntail, is soo cocky.
He's the only guy that's ever made a bubblenest for me and spends a lot of his time flaring at the divider that separates him from the other occupant, Bullet (red and white doubletail). Bullet's really shy and laid back. He hides a lot, especially when he sees Promise coming. Once I had a dream that somehow Promise got through *shudders*.
Moss, my female, is alone, though she definately has that alpha-girl attitude. My guess is she would be top of the pecking order should she have company. And Flare, my veiltail, is a definate athlete. Any moment not spent zooming around the tank or sleeping is a moment wasted, in his mind.