I took several AP classes in high school (4 I believe). The ones that were worth it were Calculus and Government. Calculus because it helped immensly and I got to start off in Calc 2 rather than having to take Calc 1, which is a rehash of AP Calc. Government because I got a high enough score on the AP exam that it gave me 3 credit hours.
Physics wasn't worth it because we never got to electromagnetism, and I would have ended up taking university physics anyway. AP Music Theory was really fun when I took it, but completely worthless for my college education. Then again, I didn't take the AP test and I'm not a music major, so take that as you will.
Marsz, marsz, Dąbrowski,
Z ziemi włoskiej do Polski,
Za twoim przewodem
Złączym się z narodem.