Oblivion. Oh so very much. Shivering Isles especially, with all the weird terrain around that you can exploit, it's just asking for you to exploit the not-very-smart AI. Of course, occasionally, it'll surprise you. Elytra are rather skilled at getting to you on a variety of terrain types... And, yeah, the 100% Chameleon thing totally breaks the game. You can shank an enemy in the back 5 times with 100% Chameleon and he'll dismiss it as being the wind, even as you mock him in the voice of TF2's Spy. Or maybe that last part is just me... But yeah, enchanting stuff of your own or creating your own spells is a great way to break the game. I personally have two bows that will cause any hostile creature or NPC to briefly turn to my side just long enough for him to get in a fight with his buddy, and since NPC's can't yield to each other, they invariably kill each other while I snigger from the shadows. It's almost as if the game wants you to break it...