Being on a 15/15 roster and being lucky to live where the plane mostly fly from, I happen to have anything between 5 to 15 overnights a months, with the latter being normal in summer season.
Can be a blast or a pita depending on the crew you are with, and of course the destinations.
I will admit I have enjoyed some spectacular days in sunny greece or spain with fantastic colleaugues, and some miserable ones in not so glamour places in eastern or central europe.
Ps: now in sardinia for the weekend in a nice hotel, weather is glorious, food is great and meeting with an old friend. Could be worse.