I've done night freight, biz jet, air force and major airline flying over a long career. I have to say, all things considered, the freight job was the best. Lots of layover time, high ratio of soft to hard pay hours, less formality, good pilots and people to work with, and on and on.
To be certain, there are drawbacks, like head nodding in fatigue, grubbiness after a long, hard day, having to drink a beer at 7 AM so you can sleep, and others.
But I'll stick to my claim it's the best overall. To get there, you want to build jet, preferably heavy jet, PIC. Build a good reputation, treat others well, have a lot of buddies who one day will help get you in.