In general, my sense is that I am considered to be friendly and affable when I am out and about in public, e.g., grocery shopping. I have engaged with strangers about this or that when the mood strikes me, and I am almost always met with a smile and return engagement. I don't tend to space when I am out in public so I don't get that slackjaw 1000-yard stare thing going.
I once sang a part of a 3-part harmony of Extreme's "More Than Words" with two total strangers (1 female, 1 male) in a check-out line because - well, I don't know. The song was playing on the overheads and I met eyes with these people and it just started.
That's the only time in recent memory when I have let my freak flag fly. Most times I am keeping to myself.
I have the sense that I am well-liked, but I think and feel part of that is because I like other people and it shows.