Three things about London

1. London has a lot of pedestrians. A lot. There are so many that at each crosswalk no one really bothers with waiting for pesky things like crosswalk lights. There are almost always little handy islands between opposing forces of traffic, which makes it quite convenient to run across one section, wait for traffic to die down the other direction, and then continue one's journey. If cars are backed up through a traffic light, the pedestrians will cross in front of them until there's space for them to go forward. The drivers don't seem too bothered by this (unless some really egregious blockage occurs), but then again, how could they? There are almost always enough pedestrians to swarm any resisting car, maim, and kill.
2. So far, it's been interesting to see what restaurant owners at various touristy areas do when faced with conditions such as Americans, large crowds, disturbances, etc... I certainly hope I've seen the worst of it, and thus will try to avoid blatantly stereotyping in my mind, but the various owners so far definitely seem to be in the "get 'em in, get 'em out" mentality, which makes sense, if more than half of your clientele will never make a repeat visit. We were at a restaurant (that shall remain nameless) by several known landmarks and were seated outside. The food was quite good, so I'll definitely recommend that part if pressed. But it was interesting to watch the main greeter and his attitude towards tourists vs. non-tourists. Locals he would joke with, shake their hands, share a decidedly "British" eye-roll when something wasn't too their liking (a brilliant beat boxer did a short set, and this pair of blonde ladies left irritated... seriously? An amazing artist shows up for free, and you're going to roll your eyes and leave? All right then), but Americans (not just us) were somehow just a little bit underneath his gaze, if you know what I mean. I'm not really irritated or anything, as I think it would be hard to maintain a completely genuine demeanor in (a) such a crowded, hectic environment with (b) such inconsistent and often loud crowds. But it was interesting to see such a marked difference.
3. British crisps are definitely better than our chips. The packaging looks almost exactly like Lays back home, but the crisps are lighter, thinner, well, crispier.