Some old favorites
Clouds, with a polarizer on the lens, flying in the direction of the rising sun
Fall in Schenley Park (or should I say, light in Schenley Park? ;)
Kuwait: looking over the Alia-Ghalia towers, some beaches we walked over to often, and the Coast road.
When you grow up there, you quickly learn to look forward to cloudy days.
Paris: the Eiffel Tower and the Seine at sunset.
Paris: The Seine (and the city), from the second floor of the Eiffel tower.
More recent attempts are on Flickr.