I have to give a tip of the hat to the true bumblebee goby I have, too. Personality Plus. He sucks himself to a java leaf and spots an invisible piece of food floating by and nabs it, looks at me like a little cartoon frog, and hops back up onto another leaf and sits in wait for his next victim. Also fearless. Will scrap with a 3" ram no problemmo (he's about 3/4").
Smaller fish the dario dario been wanting one since I started this hobby but never did get any. Bigger fish the badis badis. Right now the rummy nose tetras are my favorite I have a school of them in my tank too. When I use to keep cichlids I would have to say red zebras.