I turned my hobby into a biz so that I could someday be a SAHM. I'm not brave enough to publically share the details at the moment but maybe someday
Other hobbies, well I read cookbooks from front to back like a novel. I love love love cooking, baking and creating new recipes. If I couldn't cook I'd go bonkers, it's always been a huge relaxing escape for me. Veggie and herb gardens keep me busy and fed all spring and summer. I dabble in photography, painting and quilting (small teeny tiny projects).
I'm a night owl so I pretty much do what I like when the house is quiet....maybe I've been preparing for kids all along
OP: It's just anything you do to relax or escape for a while....you could collect magazines as a hobby...SHOPPING..shopping could so be a hobby if I let it be. I love food shopping so much I once considered doing that for a living! Serioulsy, like helping mom's and folks who couldn't get out to do it all the time. I'm sure you have hobbies, just not what you think others would consider a "hobby"