There are good and not so good units in both the AFRES and ANG. By that I mean morale, commanders, and people. Also, look at the aircraft and mission of each unit, and determine which one is more appealing to you, and which one fits in better with your lifestyle, in terms of deployments, training requirements, scheduling, etc. Some units have mandatory UTA's and others do not. In general, the KC-135 requires less effort to maintain currency and qualification than the C-130, due to fewer "beans." I second the notion that you do not want a double commute, so the closer to home the better. If you have more than one offer on the table, spend some time around each unit to get a feeling if it is a good fit for you. In years past, the Guard was viewed as more laid back than the Reserves, but each unit is different.
Good Luck, and welcome to the Total Force!