I consider all-male mbuna to be much trickier than all-male peacock/hap. Some species are tougher to tell male from female, so hybridization is always a concern. This can be taken care of pretty easily with the addition of some synos though. Aggression can also be an issue. I keep some mean predator haps, but they're not bad compared to some mbuna I've kept.
If you're just starting out, I'd pick out 2-4 different groups of mbuna (tank size again?). Ratio and total numbers will depend on your tank size and species, but generally somewhere around 1:3 - 1:5, depending on the species. I'm also partial to this setup because I like to watch the behavior and it's always fun when babies show up.
If you're just starting out, I'd pick out 2-4 different groups of mbuna (tank size again?). Ratio and total numbers will depend on your tank size and species, but generally somewhere around 1:3 - 1:5, depending on the species. I'm also partial to this setup because I like to watch the behavior and it's always fun when babies show up.