Biggest difference for me is that as an adult I have the funds and the space to do more….by more I mean in my youth I had many tanks but none of them were a ascetically pleasing. Basically I had a lot of tanks but none of them were particularly pleasing to the eye. Now with added funds and a much larger house I made the choice to go for quality over quantity. Each of my tanks, IMO, looks like art in my rooms. Bare tanks on cinderblocks have given way to plants, hidden filters and 3D backgrounds. The tanks just look more grown up. Lol