The most important is safety. Low crime and zero homeless.

Rent control is a terrible policy. This has been demonstrated in the last 100 years in multiple countries.

Public housing has been a disaster in USA. High crime and high drug dealing domiciles.

Tokyo is a model city. Zero crime, zero homeless, clean and affordable housing. How did Tokyo solve the affordable housing question? They encouraged developers to build more housing units. Supply and demand curves still work

Notice the high crime rates in countries outside of Europe and USA. Maybe we should restrict immigration from those areas to increase livability in USA and Europe