I’ve yet a find my hobby or interest that I think will stay with me, but I still haven’t tried everything yet, have I? :)
But I tend to lose track of time with anything that doesn’t involve a great deal of conscious thought. I can sit at a desk and doodle or colour in pictures absent mindedly whilst hours pass.
Also, a warm bath on a cold evening; when you don’t ever want to get out because it’s nice here and so cold Cold COLD outside.