For size : Dovii / Managuense
For Color: Red tiger Motaguense
For Atttitude: Any guapotes that interacts w/ the owner. I would personally have a fish that attacks me through the glass and flares at me non-stop than something that hides all day and be skittish.
Each fish is different.
favorite would have to be the dovii..it has sheer brute strenth and it is not that bad lookin, getting some more today as well as red tiger motas.. pics soon.