i heard that i get to pick 3 posts for my wish list, which is not guaranteed.
but in any case what are the 3 best posts for a 74 bravo to best further his career?

All you can hope for is that you dont get stuck in an MI Unit! You wont have a TS clearance, and wont be able to work on their boxes. I thought that It was bad that I got assigned to an Infantry Unit on my 1st tour, but it made me see what the real army is like. You will do the meat of your job at a DOIM. Every post has one, but its not real likely youll get slotted in one.