I lived and worked in London for a couple of years (aged 18-20).
It was exciting and a fun...if rather weird place for me then, but it's just changed so much over the years that the attraction has worn off.
My first job there involved driving all over the city every day, so I know my way around .
I did take my ex and the children there to see all the sights and look around the museums and parks though, when they were younger.
We stayed with my (posh) brother and his family in Tunbridge Wells.