My first tank was mbuna, still have it running too. I really like the mbuna tank, but I think I'm more proud of my Peacock/Hap all male setup. The colors are just amazing. That being said, Hara (mbuna) are probably still my favorite species. A lot of that has to do with the fact I have been keeping them the longest though. I do feel there is more variety in peacocks/haps. IMO most mbuna are very similar making it hard to find a variety of tank mates. Don't get me wrong though, I LOVE my mbuna tank. It's the only one in my living room on display.
Myself, I like having variety. I have tanks from Malawi (mbuna, peacock, haps) and I also have a Victorian tank. Working on getting my Tang setup as we speak. Next up, maybe some shellies and eventually a CA/SA. Eventually I want to get a SW tank setup, but everytime I get a new tank I can't help but always 'need' another tank and put more Africans in it.
For me, haps and peacocks over mbunas. They are more appealing IMO and it shows especially when you are at a LFS on a busy weekend. I observe and find more eyes are attracted to the peacocks and haps. It's not the price that make them attractive either! :lol: I like the average sizes of them and their shapes.
As well, peacocks and haps seem to increase in value as they age to become adults over mbunas. I find this extremely appealing. Nothing against mbunas - I still think demasoni and yellow labs are awesome!
I have a very expensive all male 100g hap/peacock tank at the moment...and I thoroughly enjoy it. The fish are vibrant and large and everything I look for. That being said for some odd reason it has ended up being more work then my 29g mbuna tank. That one was fun and more set and forget.