Some pubs I've been to recently:
The Windsor Castle. Great beer garden, low ceilings, proper English pub. Named because you used to be able to see Windsor Castle from the windows upstairs. It's in Notting Hill, near Holland Park.
The Angelic. High ceilings, long bar, tall glass windows, wooden benches. I went on a date here, and it was perfect... It's in Angel.
The Raven. Friendly, relaxed, good outdoor section. Good little local pub. At Stamford Brook.