Yup, I'm in agreement.
I've been a fair weather shooter mostly until recently. I'm now trying more conditions and more projects to give me something to shoot no matter what the conditions are.
On Saturday the wind was almost gale force at moments, the rain driving at points, but I was properly dressed, had my tripod and just took my time taking some longer daytime exposures to try and capture the atmosphere in black and white (film).
Those breaks in the rain can leave the air really crisp and sharp, and when the sun suddenly comes out you can get very dramatic shots. Overcast days can also be good for street photography. Throw in a flash and you can get some good contrasty shots of people with a less distracting background.