I prefer night, aside from how busy life is at day, at night i can feel more at ease and i love the dark because of how calming it is. I usually take a walk at the park in the middle of the night when i need some time to think. The fact that there's no one around me is kind of... nice.
Nightime is trully alluring, but sadly I tend to fall asleep before midnight. That said, I don´t like daytime that much. Too noisy, too many people, and too hot.
So, I´ll stay in the middle. Sunset and sunrise are the best times when you want to see amazing views. That precise moment were light and dark harmonize in the horizon is simply magical. Precisely because it doesn´t last long is that makes it more precious