Another opinion on the tires:
I chose to stick with the run flats. (I have the same ones as Edge). I don't mind the harsher ride at all. I decided to keep them because I don't want to have to deal with changing/plugging/sliming a tire in who knows what kind of a neighborhood.
I do agree they aren't perfect and you can still have problems, just as the person on the run did.
You CAN fix them if you get a nail (or similar) in them, as long as it is further than 1" from the sidewall. Mr.Tire can deal with run flats and they're pretty common in the area.
It comes down to a personal preference. I was ready to switch to non run flats and realized the piece of mind they gave me was worth the trade off.
As for your other questions...
I always use 93 (or 91, if 93 isn't available).
I don't have anything to add the other questions, those have been covered pretty well.
I always wave, unless I really don't see you, and then I feel bad. I hardly ever get waves back, but that's ok. (Well, not really, but I can't take away the person's MINI)!