Starting with freshwater I always wanted to have and keep corals. I started with a nice little 10 gallon reef, with less knowledge then I should have, after loosing a couple of low end SPS and such, I learned my lessons about keeping SPS types. I moved and upgraded to a 24g softy/LPS reef, with a 90g FOWLR. As time progressed I accumulated things and the FOWLR slowly became a softy/LPS reef as well. I also have a large 125g freshwater, I'm tearing it down, and changing it to a FOWLR, that will stay FOWLR because I don't nearly have the time/money to deal a huge reef.
I would love to have a large reef, but think I will always like the FO tanks more.