This also made me realize that the most fun I've had in inferno are against mobs who have special innate abilities that require me to change my approach, as opposed to just attacking until I take too much damage, and then kiting until I can find a way to heal, which is just repetitive and annoying instead of really fun (This usually happens in group games for me, though). Another good example of this is the mobs in Halls of Agony (forgot their name) who will charge up their giant mace that will do massive damage unless avoided. If avoided, the mace gets stuck in the ground, giving the player time to damage him freely. This causes me, as a barbarian, to do this dance with those guys that is engaging and different, and thus for me, fun.
My suggestion is to add innate abilities like this to more inferno mobs. If the only premise of Inferno is that mobs do more damage, then the game becomes rather boring, honestly.