OK fair enough...sometimes search doesn't turn up a whole lot. I'm personally a fan of AA - I don't know for sure, but I think they have a decent BOS presence.

Do you have any idea what your destinations will be? Best thing to do is pick your most likely destinations and plug 'em into Orbitz. Look at gate-to-gate durations and - importantly - look for a diversity of route options to those destinations. Find a carrier that offers plenty of daily flights and - if you have to connect - options through more than one hub. If Chicago is buried under a foot of snow, will your airline be able to get you home? Since you are in BOS, you at least have a large home airport going for you. Everybody flies there. Perhaps consider other nearby airports (such as Providence) where the airline flies - you might not want to use Providence, but if you fly enough you're bound to run into a situation where you'd take a flight there over a night in an airport.

I happen to like AA's frequent-flier program as well, but don't let one particular bell or whistle in a program convince to fly an airline that doesn't serve your area all that well.