Best part of flying cargo?
No drunken or disruptive pax.
No Flight Attendants to worry about showing in the hotel lobby at 1700 for a 1715 shuttle to the airport which leaves for the airport every hour. If you have the burning desire to see a F/A, find one the hotel you are staying at.
Generally weekends and holidays off. Some layovers I had afforded enough time for a mini vacation.