I personally found AP World History to be one of the most important classes I've ever taken. The subject matter isn't why it's the most important to me, though it certainly is fascinating and I loved it; rather, AP World History taught me how to write well. If you take any AP classes that aren't AP Calculus or AP Chemistry, you will need to be able to write well. AP World History prepares you to do this. The students in my later AP classes who didn't take AP World History really struggled due to the amount of writing, especially argumentative writing, that we had to do.
Tl;dr: take AP World History--it'll help you out in a major way later on.
If you have any questions about other AP classes, shoot. I've taken AP World History, English Language and Composition, US History, Computer Science Principles, Statistics, US Government and Politics, Biology, and Psychology, and I got a five on all of the exams besides AP Bio, which I got a 4 on, so I'm pretty well-versed with almost all the common AP classes.