1 - you won't buy expensive frozen shrimp for yourself but you will buy frozen (brine) shrimp for your fish
2 - you won't turn on the lights in the library (aka fish room) at night because your fish are sleeping
3 - you spend more time each week cleaning and maintaining your tanks than you do your apartment
4 - you sit watching the fish even when the lights are out in the tanks and the room they are in (no, I don't have night vision goggles)
5 - you have more medications for your fish (just in case) than you do for humans
6 - you buy that expensive (to you) Tetratec PF150 filter just because the LFS
has a deal where you get a free t-shirt with a cory on it
All of the above are true in my case and came to mind without really having to think about it.