Friday Open Thread: Better to run alone, or with a group?

Is running alone your thing, or do you prefer to run with a group of friends/running buddies? What do you like about each, and what’s the best (or worst) experience you’ve had with either? I ask because until a couple of years ago I had a great group of friends I ran with, but life has sent us in different directions now. What’s your experience? — Terrell