I feel like it's so much more rewarding to play in a stealthy manner when you're on your own. Watching a village from the distance with binoculars or scope before dipping in to scout around, grab some supplies, and creep back out again, trying to go as unnoticed by zeds as possible. It's thrilling! Comparatively, I find I get less sneaky and a bit more "guns blazing" when I'm with other people. I also love the quiet sorts of "alone" time that you get when it's just you, hiking from town to town with no sounds around you but the wind and your own breath...