I would like Southwest either way. It is a friendly airline as described in the other posts, and it has a remarkably easy and homey website. But whether I get an "A" or a "B" or a "C" on my ticket, I have never been crazy about standing in lines for up to an hour to grab my preferred aisle seat. Also, what is and will be your primary competition in Florida for years to come -- JetBlue -- has assigned seats. Assigned seating doesn't seem to be a problem for JetBlue and certainly not for their passengers (which sometimes includes me!). I vote for assigned seating.
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