I have lived on the borders of Hackney/Bethnal Green for 10 years. Herewith my thoughts - I WILL ONLY MOVE FROM THIS PARADISE IF I INHERIT A CASTLE IN SCOTLAND 
there are extraordinary parks, amazing musuems, galleries, restaurants from the £5 a pop amazing Turkish grills to £100 a head 6 course taster menus, food markets, flower markets, jazz clubs, comedy clubs, chic boutiques and grimy vintage shops, Brick Lane, walks along the canal to Islington one way or Limehouse the other. It's walking distance from St Paul's and from Fleet St if you're so inclined, there is a proper community spirit, musicians and civil servants and teachers and artists and everyone and anyone mixes together cheerily, your children will relish exposure to every culture, every kind of food stall, cafe, grocery and religious festival. London is the greenest capital city in the world (I fink!) and Hackney one of the greenest boroughs. Homerton Hospital is on the up and I have better access to NHS dentistry, an emergency walk in clinic (last year I cut the tip of my finger off, twice
) and a briliant GP than anywhere I have ever lived.
Transport - fuck fretting about the Tube - that's for surburban types
. An endless fleet of buses can get me to London Bridge in 20 minutes and to Waterloo in 45. And you can walk, too - it's only 3 miles to Holborn and much of that is along the canal.
My 70 year old mother feels safer walking alone here in the evenings than she does in the small Essex town where she lives now. I feel saved and even loved here - recognised by shop keepers and the greasy spoon 
It is the absolute dog's bollocks, as someone mentioned before.
Obviously being inner city there's dirt and graffiti and what have you, but IMVHO it is SO much more important to have a vibrant, thrilling, brilliant culture, exposure to as many kinds of people and as many wonderful experiences as possible, than to have (for instance) a neatly gravelled driveway and expensive kitchens. Chacon a son gout and all that, but I would never live anywhere else (and i've lived a spit from both Hampstead Heath and Crouch End).
LONDON ROCKS. EAST LONDON ROCKS MOST
GetOrf PM me if you want more deets.