when i met my wife, she thought that fish tanks were pointless. she also was deathly afraid of tarantulas, snakes, lizzards, birds, practically any and all creepy crawlies. i married her after around three weeks of dating, about four and a half years ago.
since then, she has come to love tarantulas, snakes, lizzards, birds... she even kept a dubia roach colony going for a bearded dragon. for valentines day i bought her 3 pairs of betta channoides for a 40 breeder we set up a couple months ago. we have over 20 fish tanks. any time i want anything, or do anything related to hobbies, my wife only asks if we have enough money. same goes for her, whenever she wants something, i only ask her to keep me informed of what she is spending so we can manage our finances.
when i asked her what changed her mind about all the creepy crawlies, she said it was the way i talked about them. apparently im a good salesman
it took her a couple years to get into aquariums, she just had to find the fish for her. it turned out to be wild type bettas.
one memory i am especially fond of: when i was in iraq, i received a letter from her, enthusiastically proclaiming the birth of 26 baby garter snakes from a pair that i had set up before i deployed. unfortunately, a cat knocked the cage over shortly thereafter and killed the babies, but it struck me then how she had gone from deathly afraid of snakes to enthusiastic in just a couple years.
i always tried to share the joy i experience from my hobbies with my wife. i would carefully explain why it is that i love what i love, and try to relate them to her interests. maybe that is the difference?