I also feel this way... You're forgetting Falmer, though, which I feel are the most obnoxious enemies! However I don't mind just running in and one or two-shotting every enemy. The thing that bugs me the most, and this may be a little "off topic", is when I'm in the zone with my mindless slaughtering and out of nowhere comes one of the overpowered mobs (compared to the other mobs) ,like a Druagr Deathlord or something, and whoops my butt. That, or some lightning casting milk drinker that keeps backing away from my War Hammer. I'm not saying I don't like the difficulty, but It always catches me off guard after mindlessly bashing 10 or 20 low difficulty mobs. Back to the original topic... yes some more enemy variety would have been nice. Most of the time in Skyrim I don't feel like I'm here nor there, the only difference is how much snow is on the ground.