On public transport, London is amazing compared to where I grew up.
Want to go somewhere? Buses ranged from every half hour to every two weeks (I kid you not).
After 7pm? You're walking home.
Got a GF 14 miles away? You're cycling there and back. (I'd have gotten seriously fit if that one had lasted!)
Moves to London, Edgeware, top of Northern Line. Station is ten mins walk. I had a car, because my weekends were away, but it parked up on the street and didn't move. OK, it did once. I naively figured that the North and South Circulars were some kind of speedy road that would enable a quick trip to South London. Didn't make that mistake twice :-)
Even now, I drive to Hillingdon, park, get the tube. 1-2 changes and maybe a bus, I'm anywhere I need to be.