Yay, I'm glad someone made this thread because I've been kinda wondering about this too. It's interesting to read the replies.
I actually didn't care about fish before my mother-in-law started giving us bettas, about a decade ago. I guess when she really likes something, she wants loved ones to have it too. At first we were like, "Darn it ma, we don't want to bother with fish! They're boring." But I got addicted! It's been fun setting up aquariums for the bettas and seeing how happy and active they get when they're finally freed from their 1/4 gallon containers.
I'd be so bummed after each betta passed away and didn't want to look for a replacement, but as soon as my MIL found out we were fishless, she'd go to Chinatown and we'd have a new veiltail. We've had four (including Fishbert) over the last 10 yrs.
My hubby never really got into bettas though. He thinks Fishbert's 5-gallon should be housing like 4 other fish. One morning I found that Fishbert blew a ginormous bubble nest and was greeting us by waving around, and when I pointed out to hubby about what a happy little fish he is, he replied, "Of course he's happy! He's got that whole thing all to himself."
EDIT: I am finally hooked enough to have made my first Aquabid purchase! A gold halfmoon... I think I'm gonna call him Moondance.
I'm excited and nervous! I want his tank to be perfectly cycled when he arrives and am planning on taking hours to acclimate him.