Aaaaggghhh....this is too hard to pick one favorite. So I'll pick one from each of my main tanks. In the 55 living room it's my Ctenopoma Acutirostre with the angelfish being a close second. In the 135 (this one is hard!) I bought the tank mainly for my Jag which I love but I've been really loving the Synspillum lately. In my 55 bedroom tank my Green Texas of course.