I love riding in London and will often do so for leisure, not just a commute.
It's not the buzz or the thrill, just the pleasure of keeping up with, or being faster than almost everything on the road. Plus the freedom to enjoy town, go where I want, stop when I want, get off and walk, cruise, pace it out...see a coffee shop and stop, just like that..everything. Riding out of town feel less safe to me, until I get far out of town (or out of the country) and find really deserted roads.(France is good for that)
So full on or totally empty suits me, everything else feels more dangerous.
Edit...survey needs a "none of the above"