"All or nothing"? I had to think for a moment before I realized that I call that "infatuation" or "obssession". I am that way about anything that interests me, at least during the learning phase (which occurs at the beginning of a relationship just as at the beginning of a hobby or course of study.)
To break out of this category, I'd have to be able to say I am not obsessively committed to everything that interests me. Which, come to think of it, is true: folk dancing, permaculture, macramé, ...
But, you know, I have plenty of fun with my infatuations and obsessions. Life isn't complete without them.