It's both for me. It's a hobby, because, as was mentioned previously, it's so much more interesting than smoking (I never watched a single analog review on YouTube or tried different brands of analogs), but it's also definitely a habit. I would never call it a nasty habit, because there's nothing nasty about it (except the occasional burned carto). I vape a lot more than I ever smoked. I don't know if I'm more attached to it, because I never try to cut back or quit vaping - I don't see the need - but I was always trying not to smoke.