Dark zone is pretty good solo. I'd been sweeping the areas west of the DZ doing missions and collectibles (just playing it like a tomb raider game really..) and so I figured I'd try a change of pace.
Simply having other players running around makes a huge difference. Because of the PvP you'd get some eyeing each other up and being hesitant, but mostly people would cooperate in firefights against enemies.
I got killed by one rogue guy at an extraction, and then ran back there after respawning to find him hiding in some scaffolding and we had a firefight which I lost
. I then went back and during another extraction I saw him hanging around so I held back and watched to see what he would do. He went rogue so I attacked him, but others got caught in the crossfire so I turned rogue too and then others killed me.
Last time I saw him he bumped into me as I came out of the DZ checkpoint. that was an awkward moment. Lots of random emotes and circling around. Eventually he ran off.
Going to do the DZ more regularly now I think