I've been a nurse for 23+ years now (boy am I old!) and have worked all kinds of jobs and all shifts. I am now working 12 hour nights because I love nights. Part of the attraction is what you have already noted - friendlier staff, also more willing to cooperate and help each other; but the other pluses are less managers around
and doctors are usually only there if you need them.
The downside is the sleep, or lack thereof. Some things that I have learned to do is disable the phone ringer, door bell and any other noise makers; turn on a sound machine - it blocks the daytime noises that keep you from deep sleep; and use an OTC sleep aid only when I'm working back to backs. It also helps if your family is old emough and willing to be supportive, ie no phone calls or fights, etc.
I'm not sure that I've given you any new ideas, but I'd like to give you encouragement that although oour bodies may not be set up for nights, you can make it work and can have a very good time, too.