I wouldn't say favor them more, I've seen a good amount of AM and AD get selected for AMDO. As well a few AMEs. like exNavyOffeRec said, the more maintenance background you have the better. So if you've worked on more than one platform, have documents so casing your maint skills and leadership you'll be fine. I was an AM while on Active Duty and did six years in the Reserves an AT.Interesting, definitely answers a lot of questions I had regarding that. The AT board list with respect to just enlisted has only a few non-aviation rates. I had also noticed that the AMDO community favors AT and AE.