I think it's too specific to say that comic-making is my main passion. For me, it'd be the broader umbrella of art in general. What comic making does is allow my passion for art to work together with my other passion, which is writing/storytelling. The two are inextricably linked for me -- I'm terribly bored by art that doesn't have a story. I'm not the type to, say, paint a bowl of fruit because it's pretty, most of the time.
While I wouldn't call them passions on the same level as art and writing, I do have a lot of other things in my life I pursue and deeply enjoy. I like sewing and cosplay, I like gaming (PC and tabletop RPGs), I like cooking and wine tasting, and I'm a voracious reader of a wide variety of non-fiction topics, and also enjoy reading a lot of urban fantasy series.