I'm not going to refute anything that has previously been stated about ATA. Customer service can be pretty poor, pay is terrible relative to other carriers, and morale is low. I would agree that going to work for another airline would probably be preferable than working for ATA.
However, at least I'm still flying. I've been turned down by SWA, I declined an interview with TWA several years ago, and no other major has called me for an interview, so I'm going to have to make the best of it here at ATA.
I flew scheduled service on the 727 out of Midway for a couple of years and have been on the L1011 for the last year. Yes, commuting to MDW was miserable. Now that I live in base (LAX), my qualitiy of life has improved tremendously.
So, you can decide what you want to do. If you are willing to move to your base, your life at ATA (or any airline) can be OK. Commuting will always S*CK. Hopefuly you can get hired at a better airline, but if you'd rather fly than be a Wal-Mart greeter, insurance salesman, bartender, or whatever, then go ahead and send a resume to ATA.
If you do get hired, be prepared to go on strike though. The pilots here are not happy and are willing to shut down the company to better their way of life.
Good luck.