I had a fling with fancy soda pop for a while. I would order unusual soda online. It's too much sugar though.
You could develop a vegetable juice obsession. If you drink the juice of dandelion leaves it gives you a headache at first (usually) then stops as you get more used to the nutrients. Maybe it's an embarrassing male trait, but there was a kind of thrill for me to drinking stuff that is highly nutritious but a shock to the system at first.
Or, practice baton twirling and carry one wherever you go. No, actually, don't do that.
Knit. Macrame. Crochet. Learn sign language.