First tank looks great like the geos and the pike behind the driftwood the only thing I would do is add more plant to the 1st one. Others don't look bad but I just don't like african cichlids. Just not my kind of fish.
Guinacaras, Geophagus and Crenicichla OH MY!!!! LOL!! Thats awesome man!! Can't stop looking at the first tank, didn't even realize there were other pictures!!