oh, the fish but has bitten you hard!
i commend you for keeping up with all of them so well, and you should be really greatful you have such awesome parents. i too was allowed only two tanks growing up, but now that i am grown and my parents have divorced, they both have gotten involved in the hobby and have tanks ofthier own, because they missed mine being around. i set my dad up with a 150 african cichlid tank in his basement, by the entrance to his soundproof music studio (all his old fart hippie friends love that tank!) and he has a 10 gal quarantine/ nursery in line on display next to it (he frequently has babies) and he got his new wife involved in a 20 gal ornamental goldfish tank.
my mom has dwarf puffers in a planted tank, and softshell turtles
there must be drugs in the fish (lol) why else would we all get so addicted?!
i like your rock formations, and the fact that they have caves for the fish to hide and swim. my only suggestion would be that you add some pagoda stone or lace rock to your african tanks to creat more in and out caves for them. if you do this myou may wind up with babies!