1. Not that this one should be a surprise, but I miss not having to worry about drinking and driving. I miss having public transport as an easy option to get me home after being out in the evening and having more than a couple of drinks.
As a result, I'm keeping myself fairly sober. Or sadly, am just drinking in the hotels... ;)
2. I miss English public loos-and the privacy they afforded. Proper walls that went to the ceiling and to the floor. Proper doors that didn't have 2 inches of space in-between the door and the wall.
American public toilets...#fail. I'd never realized how massive the lack of privacy was when you went to use one (even on trips back here..), but the past few weeks, it's all I can notice when I'm in the bathroom.