I currently have F1 longimanus and Robertsoni. I chose those species because I had never kept them, and COTA had them for an inexpensive price when I placed an order for other species. I have always enjoyed the mannerisms of geos; the Criboheros filled a similar niche and are a better fit for my water chemistry.
I personally like the look of the Robertsoni better, but the longimanus scores points for being way less common. My Robertsoni have grown considerably larger; the fact they are not breeding may account for the accelerated growth rate compared to my longimanus. The longimanus are very active, and I found them to be super easy to breed. They get along with others, but really flip the switch on aggression when starting to breed. Luckily their mouth is not structurally the strongest. The colors are more subdued on the longimanus unless the lighting is really good. That tank gets some sporadic morning sun and when it does the iridescent colors on the body really pop on longimanus.
I raised a huge batch of fry, sold a few dozen, then gave away about 120 of them at 2 to 3 inches in size. As soon as I thinned the ranks to 10 fish the remaining fish started breeding all over the tank. It seems longimanus are almost like convicts when it comes to breeding.
My longimanus are not skittish, but aggressively beg for food any time I walk by the tank.
Sorry poor pic, but my best images of longimanus are videos so I can't easily post them.
I have really enjoyed both species and I will be trying some different Criboheros species in the future.