He'd miss pork pies the most, I think.
LOL.... so would my DH. We also joked about how much HP sauce we would have to squeeze into the suitcase if he were moving to the USA (for some reason, it was impossible to find in Dallas, I looked everywhere for it, even Central Market!) He would miss the bacon rashers here, too. He loves his bacon butties with broon sauce!!!
Besides the food, which would be a bit of an easier adjustment, he would have a hard time in the city. He doesn't like UK cities, let alone US ones. He loved camping in Arkansas and could really see himself living out in the country somewhere, and he loves the bigger houses and apartments, too. He would miss the sea terribly, though, so I think we would have to take that into consideration and try to move somewhere warm, but near the ocean, and not too crowded. That's easy to do in the states, isn't it?

Overall, I don't think it would work out. Not to mention, it might be hard to find somewhere that is nice and warm most all of the year, but not too hot. I think he would have a heat stroke if he had to live in the southern states during the summer, but the northern states would be just as cold as it is here, or even colder. New England might be a good choice, but as someone else has said, that would be nearly as expensive as living here, if not moreso. Finally, he has a two year old son that I would never leave, let alone ask him to leave behind, and if we moved there, we would hardly get to see him. So it isn't an option for us. Maybe in our twilight years we could consider living there somewhere, but location would be a lot to consider.