These are the following classes I plan on taking next year as a Senior. Comments on how hard each exam/class is.
-Ap Literature
-Ap Macro/Micro-economics
-Ap European History
-Ap Statistics
-Ap Environmental Science
-Ap Physics C (almost indefinitely going to be self study)
Ask other people at your school, only they can tell you how hard each course will be since although the AP curriculum is standardized, the quality of teachers and the amount of homework they assign varies greatly from school to school and oftentimes from classes within one school.