your second tank will probably be a standard planted tank, then the Q tank gets lightly planted. Eventually another tank appears, and if you are the limit of maintainence time, it may or may not get planted.
You might try a tank of shell dwellers, or cichlids with a pile of rocks and minimal plants, or a lot of planted dirftwood on sand. I'm finding the narrow leaf java fern does beautifully with standard tank lights and no CO2, limited ferts (got algae when I dosed ferts so I don't know how limited I need, maybe none!).
I think eventually one branches out into different sorts of tanks, after exploring a lot of the planted tank world. I have one tank of big cichlids (rocks and plastic plants), one bare bottom tank of discus (no decoration at all but fish), three planted tanks with Flourite and CO2, two wood and fern tanks.
Member AGA, HAS, NASH
110G, 10 adult discus, barebottom with plants on wood
58G, 3 adult discus, barebottom with plants on wood
59G thickly planted tanks, rummey nose tetras, kuhlies
300G goldfish pond outside