Ostend is pretty good. Proper full on Airport with full ATC and mixing with the big freight haulers. Very GA friendly when I went with a friend before I had my PPL a few years ago. The marsheller drove us to and from the terminal and was happy to go back when I realised I had left something in the a/c that was parked at the very far end of the apron.
There is a bus from the airport to town that takes about 10 mins. Lots of nice cafe's and shops to look around and a nice beach and marina to keep one occupied too.
