Boo,
I'll echo what Occam said, and amplify it somewhat.
- the (long and boring) circumstances of why I was glad to leave ATIS are not ones that you will experience. Between when I entered and exited the trade, good changes were made. Also my circumstances were rather unique, as I OTd into the trade from an army trade.
- the training and career progression for you will be, IMO, ones you will like if you like the work 226 folks do.
- go in with an open mind. I was just one cog in a very big machine. I recognized that *I* wasn't happy in that trade, which is why I left. Better to have someone in that billet (which could be you) who is motivated and happy being there. Mostly everyone I met in the trade loved, or atleast liked, it alot.
- regardless of WHO you meet and how unhappy, jaded, etc they are about the trade, form your own opinion. I'd recommend you wait to do that until after you are OUT of the trg system and working on the 3s OJT package with Journeymen qualified people in the trade.