Unusual journeys by tube

I don't know anywhere else  on the tube network where two trains swing alarmingly close together apart from southbound at finsbury park where Victoria line and piccadilly line trains leaving the station together provide a momentary coming together and view of fellow passengers following a different route.

Circle line minutes are more drawn out (ie longer) than Victoria line minutes. Is this because it goes through west London which has a more relaxed attitude than north London? 

Fewer suits on the hammersmith and city line than Victoria line or northern line and more likely to not be wearing a necktie. More arty women and men who look like computer geeks or college lecturers. Perhaps I've travelled The bank route for too long and have become overly used to the hard city banking fraternity. These are more my people - more art school and less uptight highly strung.