Is round cage bad for birds? Round cage or rectangular cage?

The two parrots I had came with a tall round cage. Although, it made it easier to catch them, it did not provide a place for them to fly or stretch their wings. I used to hose them for baths which they loved, but wished I had more room to give them a bath pan. I was always banging my hands on the sides of the cage and the door openings were too small.
So I guess my answer would be, depends on the size or type of bird. Big ones like parrots I would give a rectangular large cage and small birds either type would work.