The mythos that exists around SW - while it may have been true at one time - just doesn't exist today. It is just another airline with the same labor/management drama that exists at every other airline.
Trips are not commutable, so if you intend to commute I would definitely look elsewhere. The SW CBA may have at one time offered industry leading flexibility, but today they lag the industry due to the fact that you can not drop trips, and trading with the company is extremely limited due to lack of reserve coverage and duty-to-cover limits. Trading with other pilots is available, but if you are junior not many will want to trade with you or take your trip.
Major contractual deficiencies exist in little areas like bidding for training (you can't), vacation (senior guys bid all of the desirable weeks and use them as currency to trade for what they want), crew meals (none even on transcontinental trips or international turns), parking (none), uniforms (none), etc.
Vacation overlap is one positive area. Trips that touch vacation are dropped, often with partial pay. It's easy to create three weeks of vacation from one.
Do your research and make the best business decision you can with the information that you have. Don't decide based on some romantic fantasy about "Herb's airline". This isn't Herb's airline anymore.
Way better than any regional, don't get me wrong. Love my job, love my coworkers, but if AA called I'd be hard pressed not to go. (And I was formerly a USAir furloughed guy, so it pains me to say that!)