Originally Posted by Beedok
Visit Ottawa. The whole city CBD is filler.
There can be good quality filler or bad quality filler, but whatever the quality it's not a landmark. It just sort of blends in. Basically to me filler is a building with a conservative design ethos.
Landmarks can be good or bad too though, and an ugly landmark is worse than ugly filler.
The Rooms = Ugly landmark.
An ugly filler probably doesn't even have a widely-known name.
Filler is just average for that city. It does no harm, often has excellent street interaction, but it's just unremarkable in design. It's urban background noise. It's the Civic on the highway. Contributes to the overall feel the way infill does, but nothing more.
It's definitely a positive, unless it occupies a place that would've been perfect for a landmark building. But it's better than a parking lot or a break in urbanity.