FWIW, there's a lot of guys who went to AMC first who were able to come to AFSOC (across the entire spectrum from C-21 to C-5 and tankers). These guys have the flexibility to potentially flow back (saw this with an EC-130 guy) to their previous MDS. The flow in the other direction is much more difficult. If you grow up in AFSOC, there isn't a lot of flex to get you into other options out there.
If I were young again, I'd spend some time seeing the world in another MDS, and then determine if I wanted to flow into AFSOC or not later on in life. But I grew up limited to two locations and a continuous deployment rhythm to the sandbox over a decade with little opportunity to expand beyond certain theaters. AFSOC is exciting, but it can quickly become Groundhog Day. YMMV.