I have to throw my vote in with the "drive" crowd. We live in central Mississipi, and drove down on our last family trip. Though somewhat long but not overly so (9 am CST to 10 pm EST travel time, with stops) we actually found it to be enjoyable, amd plan on doing it again in December.
I have to admit that the recent events are part of the decision, but not the main reason. Though I do not fear flying, and actual think it will be SAFER from this point on, we do have to take into account of what my 8 y/o daughter might think in we decided to fly. Why add anxiety to a trip if it is not necessary ? In addition, the longer check-in times that will be standard for quite some time to come reduce the travel time difference between flying and driving. For example, last weekend I returned from a trip to WDW (alone), flying Northwest. From the time I was to be at the Mears pickup a the resort (12:30 pm EST) till the time I arrived at my house (7:00 pm CST) was a total of 7½ hours travel time. If you do the math from above, you can see that I can drive it in 12 hours, and have my own personal vehicle available to me while I am there.
Also, there are economic reasons - to be able to pick flights where the travel time is reasonable and where the flight to Orlando leaves in the morning and the return flight departs in the afternoon/evening our only choice is Delta. Unless we get lucky with a fare sale, the best we can hope for as far as ticket cost is about $170/person. With 3 of us, we are already out over $500 there, and we would still need some form of ground transportation at the Orlando end. Whether you use Mears, Tiffany, or a rental car you will still be out at least another $100 or more in addition to the airline tickets. Those few hours that I save driving is looking more and more expensive !
Also, the cost of one plane ticket would pay for a portable TV/VCR combo, which we would have for every trip thereafter. The ticket, used once, is only good for a bookmark

. Shucks, between driving down, using (already paid for) annual passes, and staying on DVC points (OKW Grand Villa) this will probably be our least expensive trip to WDW yet.