What is you favourite time of day to shoot photo? Mine is probably the Blue hour, followed closely by the sunset :) The best thing about the blue hour is, that even when the weather is bad, or just boring, you usually get a nice shot.
Like this photo, taken in Zurich. The sky is completely blue with almost no clouds, but with the water having another beautiful shade of blue, it still makes for quite an nice photo. This is a HDR from 5 exposures, created in Oloneo photoengine, finished in Photoshop.