I'm from London and love the bustle of the big cities, most especially being in a place with such a vibrant arts scene and an ever changing landscape.
I also enjoy being outdoors and finding time to relax which is why Belsize Park is so great. Between two parks, three if you count Regents park it's a beautiful part of the world whilst still being in the thick of it.
My style as a host is to provide you with everything you will need to have a happy time in London and to help you if you need any advice.
You're only every 30 seconds away from a restaurant, bar or coffee shop and even if you don't see the tourist sites, you'll get a great taste for London life just staying on my road.