Only you know what you like and don't like.....I did 18 months of pax and it drove me crazy. Don't want to stand in the door and say thanks for flying brand X...don't want to say "now sit back relax and enjoy the flight!" In fact if I never hear that @#$%ing phrase again it'll be too soon.
Sure we fly plenty at nights, also days, also international, also sit at home on reserve and not get used. The flexibility is amazing. We fly all over the world 24/7 go to places you can't even pronounce....like Peoria.
Best part about cargo... no flight attendants....worst part about cargo...no flight attendants. Whatever you like or don't like someone else will not like or like.
Air Cargo is stable and growing. Gotta love it and at the end of the day when you strap on that jet does it really matter to you what you're hauling around as long as you're the one flying?