I do prefer the boxy design in a way, the Air as it is currently feels that it is putting form over function and might not last as long for that reason.
The Pros are now out of my price range though. I was going to buy one back in 2013 but couldn't decide on the spec and later ended up with a purple windows laptop. Colours please.
Back when I was going to buy a Pro, the Air to me seemed far less premium looking and didn't have the Retina display. It's good that lighter users now have a more realistic alternative without massive trade offs.