Note on Asperger's and getting it waivered: It's easier if you:
1. Didn't take any meds (and have it documented).
2. Don't fail a class, ANY class.

Getting it waivered aside (essentially, convincing the docs at meps to declare your diagnosis bullshit, in writing), it's still going to be flagged for someone to find an excuse to dismiss them from duty.
-More discerning recruiters (such as for special forces) would likely outright dismiss from the from selection-process such individuals.

What kept me out was triple-failing the hearing-test.