I spend plenty of time in London and it doesn't scare me but it's a lonely place even if you've got friends there. My job takes me all around the world meeting lots of interesting people. But I think if I couldn't get home if I couldn't get back to what I consider my real life I'd be frightened.
The misconception is that standup comics are always on. I don't know any really funny comics that are annoying and constantly trying to be funny all the time.