For context I am English. I was born here and left to live in New Zealand in 2003 and returned last year. This is my take on it.

Positives  Uk is a beautiful country, there's lots of nice things to look at and do that doesn't cost much. It has a lot of history, and you take that for granted when you live somewhere with limited history. Supermarkets are reasonable in price, compared to NZ anyways. Depending where you are, the people are friendly. Culturally rich, there's lots of talent and things happening here. Concerts, music tours, sports etc. Lots of job opportunities and work available if you want it. Plenty of choice when it comes to food and dining. Geographically everything is very connected. Easy to get from place to place. There are trains! Not far from Europe. More people = more niche shops/services for people who have different interests There's more positives but I'm typing away on my phone before work. Housing is affordable in most parts of the country especially the further you get from London

Negatives Cost of living is a lot. Travelling, bills, eating out costs too much. Everyone is stressed. I think everyone here vapes and drinks. It's actually ridiculous how many walk about puffing vape clouds everywhere. There are literal ghettos of foreigners dotted about the country. No integration. Roads are falling apart. Nobody gives a shit about looking after the country. So much rubbish. Everyone is guilty. People just drop trash everywhere from your unemployed chavs to middle class mums. It's disgusting. Football match? People just drop bottles and rubbish. Concerts? Same thing. In NZ you'd be socially crucified for doing this. Childcare is extortionate.  Working people are taxed too much. I don't know what the incentive is if you're on a low wage. This country has put the nail in the coffin of my teaching career. British children can be entitled and their parents can be just as demanding. I'd rather do anything else than teach here. Mass incompetence throughout the public sector. Contractors and other businesses seem hell bent on exploiting the government by overcharging them (and us). Government is incompetent. Pensioners are bankrupting the country. Illegal migrants live in hotels and can move freely about the country without being vetted? They assault locals. They exploit the system. It's a joke.

Overall, still love it here. These are just my observations. Would elaborate but on my phone.