I have many interests, but I often don't have much time to devote to them. Aviation/airlines has only risen to "hobby" status within the past six months.
I have two burmese cats, however I don't consider them to be "hobbies." They are family members.
I devote a fair amount of time to playing the flute and golfing, so I suppose they count as true hobbies. However, I have many other interests:
--music (all sorts)