I just realized this, and thought it was a semi-interesting little tidbit: a couple of weeks ago, I was complaining about the sirens all of the time, at all hours of the day and night. Now, I'm starting to find them oddly comforting. I can hear a little bit of street noise, but not much since I'm facing the garden...but the sirens come through loud and clear! I live a few blocks away from the UCL hospital, which explains that.
Just something that hit me tonight. Interesting. :)