I think "good noses" are all about shape and have nothing to do with size.
My nose is completely average in size, but I don't really like it because of it's shape. It drifts off to the right a tiny bit and it's a bit squishy. I'd prefer it if it was more straight-on and sharper. Apparently only I see it though. When I tell other people I'd get a nose job if I had enough money, they're always like "there's nothing wrong with it..."