I'd like to thank everyone for posting their experiences on playing in open. It seems like the consensus is 50% friendly, 49% neutral (ignore), 1% (or less) hostile/pvp. That's good to know. I was under the impression it might be 10% friendly, 60% neutral, and 30% pvp.
I have zero interest in pvp. I do have interest in running across other players that are either neutral "go about your business" or friendly.
I've spend almost all my time in solo or group (Mobius, Chaos Wulf's former group) mode - the latter looking like solo 99% of the time. I occasionally pop into open, while docked, to refresh mission boards. I did so the other day in Sothis. While docked, you have no radar, so I couldn't tell if other players were actually around or not most of the time. This time I was sure as I have NEVER seen an NPC Federal Corvette or Imperial Cutter in the game. There were 3 other Imperial Cutters docked besides mine and two Anacondas. I took mine back up to surface, in the hopes of seeing one of them... alas, they were in their cubby holes like I was, waiting for missions. I did get to see a player Anaconda dock (port 2 or 9, just inside slot)... only a player will dock like he did; npcs and docking computers are too smooth.
Anyway, I might start playing in open more, just so I can enjoy a more organic, possibly friendly, experience...
I'll just make sure I have plenty of rebuy money first.