I learned something once doing a long final - as a result I don't do them any more. Uncontrolled grass strip, talking to the local military who gave me wind. It was obvious that no-one else was flying so I positioned on long final into wind.
I probably should have twigged this before, but as I crossed the threshold it was obvious something was very wrong, the plane was floating far more than it should and halfway down the runway it was clear I wasn't going to get down and stopped before the hedge.
As I was going around I couldn't help but notice the windsock was showing a tailwind !
We're only a couple of miles from the military base and about 12 from the coast, but it would seem that we had a sea breeze conflicting with what the military had.
Since then I've always avoided long finals even when the circuit is obviously empty and religiously either join overhead or fly the circuit to inspect the windsock.