Honestly, I hear you (esp Gregg's and humour! Whenever we walk through Newcastle arrivals, it's Gregg's first!) And also the kindness of people in the North East. That's something else for me.
But... we are always cold when we visit now! The Geordie idea of warm and ours are now completely different.
The kids often comment on the litter and cigarettes. Right now we live in a country with four proper seasons, by a lake. The bilingual thing is very important to me.
British education is good, in that it is child centered, but the way the government are running down resources and teachers means (IMO) it's not an option. (I also have a SN child and the provisions here are marvelous).
I worry that our kids are 3rd culture kids and miss out on our wonderfully rich heritage, but they are gaining so much that they would otherwise miss out on.
Crime, safety... such an important factor.
I understand what you mean about family, esp aging parents. We have lost several expat families who have moved back for this reason.
But, as it stands, right now it is not enough to make me move back.
We are going to apply for citizenship so that the children will have full rights, without being reliant on our work permits.
If you do go back, it is a major life decision and will require a period of adjustment.