Aesop,

Personally, I haven't playing with my sub long enough to be able to sympathize or identify with your plight. However, I think the real root is more your personality type. Myself, I'm on the obsessive side of things and tend to be more in to "all or nothing" which makes my life a bit frustrating at times.
Bonzai isn't always the answer.

I've found, though that taking a break or maybe exploring a different perspective helps to re-kindle my interest in different subjects. I love science and I love music, but even passion can wax or wane. Just becareful that it doesn't wane away.

~Primus