I'm afraid I'm going to have to agree with Someone on this. QC for sure is beautiful, and MTL is definitely one of my favourite cities due to its vibrance and charisma, but beautiful it aint. It definitely has beautiful areas, but only a few limited central areas like Downtown, Old MTL and the Plateau (and maybe Westmount) are what I'd call truly beautiful. And except for Old MTL, even they also have a huge amount of bland and ugly. Far from enough to deem the metro area - or even the city - as beautiful.
The problem is there is just so damn much of this. Brown, beige, and grey utilitarian structures. Each one in and of itself is not exactly ugly, but there's just so much repetition. Street after street it's practically the same thing. And many look dull and dingy from weathering, graffiti, and possible lack of maintenance.