Like Andrew I'm not sure that failed is the word. Some of them are still hanging in there
Orchids (Since I was 19. I had up to 1500 of them at one stage)
Minerals, crystals and geological formations (Since I was 8 and still going strong up until astronomy grabbed hold of me again
).
Bromeliads
Bonsai
Tropical fish
Pokemon cards (Used to collect with my son. I had full sets of Basic, Jungle, Fossil, Base set 2 and Team Rocket. Lots of 1st editions cards. Now worth a fortune)
And they are just the main ones
