I enjoy flying at night, having said that, a couple of years ago I was flying night freight and found it great for sharpening Instrument skills (B1900 No Autopilot) but departing at midnight, flying up to 4 sectors, usually block about 7.0 and get to bed at 9am... it got old... FAST!
These days, the occasional night flight is more than welcome. Nothing better than city lights from the air and even the challenge of a "blackhole" approach to an airport in the middle of nowhere keeps things interesting.
Day time flying is fairly straight forward, and I like not having to make sure I take a brew of coffee with me just to keep me awake!