Gatwick

Very nice and quiet.

Very over crowded dingy space needs upgrading

Great airport and easily accessible from London

Fly to Heathrow better and don't be cheap like me!

Too small. Gates are too far

I think Gatwick is a good choice for the first time London visitor because of the medium size of the Airport, walkability, on site hotels, and 30 minute Gatwick Express service to central London.