Everything the previous posters said about minimal lift lines and crowds PLUS:
1) Never any need for sun block;
2) Since you will be sticking to the groomers, you will have a nice consistent, fast surface, and you won't ever have to deal with snow that is being softened by all that pesky sunlight;
3) Skiing the aforesaid mentioned hard snow will do wonders for your angulation skills;
4) You will eventually encounter new and wonderous types of trail conditions such as hard frozen ruts, icy moguls, and the Mother of All Rutted Conditions, coral reef;
5) Skiers of both genders look particularly attractive when illuminated by the flattering blue-green glare of mercury lights, or by the stunning yellow pallor of sodium lights raking across their faces.
6) When skiing at night, no matter where you are in the world, you can easily convince yourself that you are really in the Poconos (if you are disposed to do so).
Tom / PM
PS - In the interest of full disclosure, and just so you don't think a non-night skier is dissin' night skiing, a significant fraction of my 30+ years of skiing has been done at night. Either it must have at least some minimal level of attraction, or the sanity of the reviewer could be an issue. I can't discount the second possibility, but I prefer the first.
PS#2 - BTW, the views (both land and sky) and the solitude can truly be sublime at night.
PS#3 - Go for it - give it a try! It's a gas!