Everyone is always impressed by large tanks and for good reason too. The sheer size, the amount of water in the tanks, the fish and hopefully the quality of the hardscape. ADG always (always) nail their tanks and for me they are global leaders. Ever since I knew them back in the day they have always nailed it and I LOVE sharing their tanks. They inspire me, even after all these years and I've seen a lot of tanks.
For some reason the hardscape only tanks really float my boat. I think it's just the calmness of them which does it. Much as I love plants, there's just something about these sort of tanks that is hard to ignore. Sit back and watch true pros in action.