To me it depends on the size and stocking. I think hex tanks over 100 gallons look stupid, but for a 90 gallon hex w/ African cichlids or Angels could look very nice. I completely disagree with hating any corner tanks though, they are great for saving space. Rather than having ,for example, a 75 gallon standard tank that takes up an entire wall or a large portion of it, you could have it just fit into a corner of the room, out of the way. To me, corner tanks are a lot more practical, spacewise.