/vr/ - Retro Games

Okay, guys. I wanna ask about that big wall texture we all know & love. Which Doom .wad (from id or the fans) had the hardest/most fun/most well designed Icon of Sin variation? The whole arena the "boss" is in should be put to consideration, since the wall texture can only spit out demons.
I personally really enjoy TNT: Evilution's arena & the way it's set up, but felt that you could do so much more with it for some extra "fuck you" put into the mix. Maybe put some enemies behind the middle textures, or something.