I've been in the Guard/Reserve over 20 yrs now. I'm sure you know the airline world is cyclical. Just yesterday DAL, UAL, etc were the places to be. Today it's SWA, FedEx, UPS. What'll it be tomorrow? Good luck guessing. I remember, pre 9/11, talking to a DAL Capt on the crew bus. He told me when he got hired he had offers from Braniff, TWA, and DAL. He just happened to pick the right one. If he's not retired yet, the "right" choice still ain't all that great.
The ART position can wear at you. Depending on leadership is at your unit you could be in for a very long ride. Trust me, if you have weak/biased "leadership" it will be a very frustrating career. Especially at Guard units, where "regimes" can last for decades.
I've been a bum, a traditional, and an ART. There's something to be said for and against all, except the traditional bit. It's nice to be removed from the petty day-to-day BS, coming in just to fly and pretending to listen to the childish nonsense that can dominate conversations about the unit. Geez, I hope you get some more opinions 'cause proofreading this, I ain't the most positive guy, am I?
Bottom line: it depends on the unit. A great Commander will make or break a unit. If you have a sorry Commander the ensuing sag in morale will ooze into and affect the entire organization.