My pet hate is airfields that declare the runway wet when it nothing of the sort - It can often make the difference between being able to get in/out and not.
Farnborough was giving wet the other day, when not only was it not wet, it wasn't even damp - the tarmac was completely dry. Wet means the surface is so wet, it is reflective - any less than that, and it is damp (ie changed colour due water).
