Do you have a favourite/nightmare place to ride in London?

Hate - Pentonville Road from kings cross to Angel. Crappy surface, long hill, idiot drivers/buses and, lights just before the crest and if you get stuck at the lights at the bottom you have to do the whole hill with no momentum.

also HATE regent street/portland place with a passion, so many pointless light and pedestrian lights you can't jump because of police (especially the lights next to the chinese embassy)

Love - Regents park - I know everyone loves it but...

Strangely I love riding gray's in road to old street in the afternoon if there's not too much traffic about.

^^ Grays Inn Road runs North/South, do you mean Clerkenwell Road?
Going round the side og HIghbury Fields, nice smooth road and not many cars, same so short