I can't say much about Glasgow as I've never been, but England is beautiful. You get used to the weather, and come to truly appreciate the nice days when they happen. There is so much history around you, I found it fascinating. We found it was so much easier to have a spontaneous adventure in the UK than it is in the US as well. We live in the Midwest, where a car is required to go pretty much anywhere at all. Flights are so expensive here, and everything is far away. In England it only took a few hours to go to a totally different part of the country.
It really depends on where your interests lie, but I really enjoyed the beaches, and staying in a caravan. My English husband thinks it's funny how much I loved the caravan part, but it's so different to anything here in the US.
Fish and chips! That doesn't even need any explanation.
Also, I know the UK has a reputation for bland and boring food, but that's not the case at all.
Buskers. Maybe it's just because I'm from a podunk town in the middle of nowhere that makes me enjoy them, but I absolutely loved going into the centre of Bath and hearing the musicians, seeing the cobble roads, the old, old buildings, everyone walking around, the little shops tucked away in the alleys.
The fact that milk is still delivered by real milkmen.
And the people I met were really nice. A lot of them thought it was great that I was an American, and in the entire time I was there, I think there were maybe 3 people I met who weren't friendly and welcoming (and two of them were teenagers). I actually still keep in touch with my coworkers from when I lived there.
I would like to just mention re: healthcare, I didn't have too many issues. I never had a long wait to get an appointment, and the care I received was great. I had a baby while in the UK, and I actually preferred the hands-off approach to maternity care there. I was allowed to go home 3 hours (yes, 3!) after giving birth, which I was so thankful for.
It is expensive, especially housing. But where we are currently living housing is expensive too, so I'm used to that. If you have children, their clothes and shoes aren't taxed, and legally school uniforms have to be affordable for all families.