Yeah I know the feeling… I used to keep Neon Tetra.
Then when we moved out we made a lovely pond and keep ornamental carp and sturgeon. Trouble is cats and wild birds would love to get them so we made a net over the top. Its also to stop the little foxes getting to them.
As for really wanting to own something, I felt the same way about horses. Oh and offcourse weapons.
PS: I dont think you have a problem. Everyone has to have a hobby