I find mbuna fascinating. The biggest problem I see with a lot of mbuna tanks though is that people generally want to cram in as many species as possible (understandable since they are gorgeous), so all you see is different males trying to chase each other off, or mating with any female in there. Personally I prefer large tanks with one or two species in larger numbers. You really get a chance to see a social heirarchy form, and it's fun to watch. In fact, if I EVER manage to get a job in Wyoming (sorry, I'm a little frustrated right now) I plan on setting up a 6 to 8 foot tank with p.crabro (love to watch them, they change colors you know) and one of the labeotropheus species (haven't decided which one yet). I think it's going to end up a great tank. 
