More of a mix, though I lean towards hobby than anything else. I've made a bit of money from commissions and other sites here and there for my works, and I've definitely enjoyed the feedback I've gotten from viewers.
But, at the same time, I don't think I'd enjoy it as much if I decided to take it on as a full-time job. I like to keep it a hobby, despite having the slight side-business. So, I'm getting my degree in Electrical Engineering, which is also something else I like. I'm currently interning at a good place (Com-ED), and I'm thinking of having my career with them.
It's not the say I believe work tears down the things you like. It's just, I draw a lot, and I mean a LOT. It is my main go-to for relaxing. So if I was drawing day in and day out, it would get a wee bit exhausting and I'd probably just end up taking a break anyhow XD