MCO is always a good bet, and is generally the preferred airport for our family. But when my parents join us, they swear by PBI in West Palm. It is a bit shorter, easier to find your way around, and much smaller and less crowded than MCO. For the return flight it is especially nice bcs there is a dedicated exit off of 95 just for PBI, which deposits you right there. Both Delta and JetBlue serve PBI directly from Boston, which makes it handy; I believe it's a connecting flight on SouthWest into Providence, but I haven't checked recently.
The flights are a little bit more most of the time out of PBI, but my parents are willing to pony up this premium for the sanity of a smaller airport. We keep thinking about trying it some time again, but the schedule is less convenient for us; we prefer the 3 o'clock return to Boston from MCO, while PBI only has 11AM and 8PM. We're still deciding for our February trip, but both are on the table still.