Lived and worked there from 1997 - 2005, which meant in terms of age I went from mid 20's to early 30's.
And my enjoyment of it was directly proportionate.
Started off as a big adventure, shared a house with a few others in the suburbs and partied and spent a fortune.
Then started all of a sudden to get a bit peeved with the tube commute in rush hour, and the constant boozing at various expensive 'wine bars' at weekends wore off as well.
Was earning a decent salary but was also spending it.
Then met the missus and both of us reckoned that while London was ok for the single stuff, we both wanted to head north to buy a house and settle etc.
I worked in camden but lived in Harrow. It's about a half hour tube journey on the met line, but the rental costs are much lower than if you lived centrally.