FOr those that made the transition, what was the hardest thing to overcome going from AC to the Reserve or NG?

For me the hardest thing was adapting to a new dress code.  The Army always told me what I was going to wear everyday and now I have a choice to a certain extent.  However the job I got was a "white collar" job that required khakis and polo shirts and I was always a blue jeans and T-shirt type of guy.  Our ACUs are for getting dirty and working everyday and now I was in a job where I sat behind the desk all day and if I didn't dress the part I was looked at as less professional than the other guy.

I'm right in the middle of it, separated active duty about 5 weeks ago and had my first drill weekend.  It was a culture shock, from how Marines wore their uniforms, their discipline, and readiness.  I thought I was in a dream it was that different.  I have yet to overcome anything in the reserves, I am still trying to soak it all in!  It will take time to transition.  

The "JAFR" (use your imagination) attitude from the active duty side of the house. I had been on active duty as the operations NCO at my unit and transitioned to a similar position in the reserves at the same command (the Coast Guard integrates its SELRES workforce into active commands to eliminate the overhead of separate reserve command structure). I knew all of these people. I worked for them, or in some cases they worked for me, but suddenly because I underwent a component change, all of the things I done; all of the schools I attended; all of the skills/quals I had earned meant nothing because I was "JAFR". There was a lack of respect and recognition of equality from the active duty world. I was immediately a second class citizen, and treated as such.