Went mount farming recently, and that took me back through some old zones. One of those was Vashj'ir, which I've always cited as an attempt by Blizz to get creative that was shut down by community reaction, discouraging something we should be encouraging (Blizz experimenting with new ideas). Yeah, there were issues with how some combat abilities worked in 3D environment, but it was open world content so was never so hard anyway. And it was the only zone of its kind Blizz has ever done. Nazjatar was a sad pale comparison - an undersea world with the water removed lol.
Likewise I remember players slamming Suramar because it was actually easy to die if you weren't careful, while I loved sneaking around on rooftops and strategizing how to achieve my objectives.
Which zones do you think were maybe under-appreciated by players at the time, or long-since forgotten, that actually deserve a round of kudos?