i think what matters more is how much you're willing to spend or how much you have to spend?
also what you consider most desirable to you. I'd say if you've never kept pbass before, test the water first. buy a mixture. if you want 10+, mix them up with monos, tems and orinos. if you have more money at your disposal buy pinimas, azuls and kelberies.
from the ones i've kept, they seem to all pretty much act the same. they are aggressive eaters, they get along better in groups of 4 or more, if you pair them or have 3, one will gain dominance over the other and one will end up being miserable. cichla are good fish to keep if you're into that type. i recommend it but try them out.
i wouldn't recommend commiting to one type and buy 10-15 of them. have several types, grow them out a bit, then if you want to commit to one, you'll get a feel of which one you prefer
just my two pennies