Once apparently called "Lower Street" (cf. Upper Street).
Some good pubs and bars towards the Angel end, and as it heads north towards Hackney it becomes rapidly less trendy and far more downtrodden -- something like most of Islington used to be before its [gentrification]? in the 1970s.
A stuffed animal shop ("Get Stuffed") where the owner has been imprisioned over illegal trade.
An apparently very good fishmonger - Steve Hatt.