You're right, my bad. Although I would argue that Singapore and Monaco are in a class of their own in terms of the shape of the track and the subsequent load on the driver and car. Montreal, Melbourne and Valencia don't have the same tight, constricted feel of the other two, because of their wider tracks, longer straights and faster corners. They're also not in areas as densely populated as Monaco and Singapore. Off the top of my head I recall Montreal and Melbourne are both around large parks? Anyway, my original point was that these circuits (in dense urban areas) result in exciting and popular spectator experiences.

I wouldn't consider Montreal a true street circuit. It's more like a road course. Also, Valencia is widely regarded as one of the worst circuits.