I just posted something related to this on a Ravelry thread!
My DH’s hobby has made him extraordinarily understanding of my knitting obsession. He’s a bass fisherman; has been for literally his whole life, and he collects fishing rods and lures like crazy – including some swim baits that cost $100 apiece. I’ve never complained about his spending, and he returns the favor for me. We often discuss various colors as well as storage systems (our house is pretty small).
I definitely agree that it's good for each of us to have our separate interests and to allow each other time to indulge those interests -- without feeling guilty. It makes the time you do spend doing things together that much better. I actively listen when he talks about fishing, and he tries to do the same for me (as long as I don't ramble on too much :teehee:).
My DH really doesn't mind me knitting while we're together; he knows I can still pay attention to him, and he frequently ask me questions about my project or my yarn.
He also likes to paint or otherwise modify some of his lures to make them look more realistic (he’s even borrowed my nail polish a few times to use as paint). So there’s plenty of times when we’ll be watching TV together and I’m knitting on the sofa while he’s hunched over his little table, hard at work. It’s kinda nice!