But remember, its the EM's that carry the weight of the world on their shoulders. Or rather, their arms.
Don't worry so much about getting a rate that you don't like. If I remember correctly, they told us that your preference factors in, but also your score on the ASVAB, so they will try to put you where you want to be, or at least somewhere where you can do what you are good at. ET was my #1, simply because the schooling seemed harder, at the time, and they got the bigger bonus. I ended up with EM, and while we get the short end of the stick when it comes to the bonuses, we actually have the harder schooling, and I enjoy every minute of it.