I adore living in London, and DH frequently comments how lucky we are to be living here, and what an amazing lifestyle we have.
We are living in one of the world's largest cities and one of the few DH can live for his job (others are NY, HK, Singapore and Paris). We live in Zone 2, in a nice-size house with a 100 foot garden. We are walking distance from 6 parks, just around the corner from a bus which will take us to Kensington Gardens, Hyde Park, Oxford Street, Regent Street and Piccadilly. We are 10 minutes away from Notting Hill, have easy access to the M4 and A40 to get out. 10 minutes away from Kew and Richmond.
We belong to a fantastic club with loads of land and activities for the kids. I can walk to the High Street to go to the shops or have the mall conveniences of Westfield. I can drive 10-15 minutes and go to a Japanese grocery store to get amazing sashimi or the Thai grocery store for other oriental goodies. We are in close proximity to michelin *ed places, gastropubs, greasy spoons, fast food joints, conveyer belt sushi places, great sushi places, fine Indian places, a fanastic Vietnamese restaurant, decent family friendly places which are not pizza restaurants (have those too), not to mention small quirky restaurants. Not to mention the Borough Market and the Sunday Marylebone High Street Farmers market!
We have the already mentioned free museums, galleries, but also all the other attractions in close proximity, from the Tower of London to Legoland and all the theatres with special productions for kids. How about the amazing theatrical spectacle of people watching which one can do in London?
I love having the Eurostar terminal here, and use it at least twice a year for day trips to Paris
Lastly, I am American-Oriental, DH is French, and DSs are truly mutts with smatterings of Korean-American-French-English in them. They are considered normal here, and our social circle is filled with similar multi-cultural families. They do not feel different and instead, feel Normal. I am certain this would not be the case in the more ethnically homogeneous countryside/smaller town.