There are many cool ones in game already, but an experienced adventurer can handle them all. What creatures would you like to see, fight, or befriend? You can go ahead and go nuts, let your imagination run wild. I doubt the Bethesda guys will read any of our ideas, but hey - I will!
Feel free to comment on other peoples thoughts too but as don't be nasty, they're just ideas after all. And who knows, it may actually be funny to see a giant space monkey that goes super saiyan and stands as tall as the throat of the world in game. *shrug* :P
I'll be putting up my own ideas here too. Just to keep em all together.
Lastly, this is my first(?) discussion post - sorry if I'm treading on toes - I'm just a noob! :P
Dwemer Bombardier - a ranged boss-level centurion, using those exploding Dwarven ballistae you sometimes find in ruins
Giant Champion - Trained giants convinced to work for one faction or another, in metal armor wielding huge greatswords
The Mighty Cliff Racer - need I say more?
Dragon Priest Initiate - lower-level dragon priest Mages that back up Draugr in larger fights
For my first entry, I think I'd like to see the Bloodsuckers from the Stalker Series.
If you don't know what they are, think of a naked, man sized Cthulhu that can turn invisible, has sharp claws, a face full of tentacles and a hunger to eat your guts out. Good times all around.
Pyramid Head from Silent Hill comes a close 2nd just for pure WTF value. ^_^
Ok since my first entry was quite non-creative, here are my next set of random bad dudes... (mostly end game types though)
Master Bladesman (sword/axe)
If attack not parried, 20% chance your weapon or shield goes flying into the sky, as if hit by a giant.
Master Macer (blunts)
If attack not parried, 20% chance a piece of equipped armor or shield is destroyed instantly. When this happens, you also get knocked back as if hit by unrelenting force.
Master Archer (bows/xbow)
Can adjust trajectory of arrows while they are in midair. Also, their projectiles explode when in proximity to the target (though they only use normal arrows).
Master Monk (unarmed)
If attack not parried, 20% chance they just take one of your equipped weapons from you - then they behave like one of the above. When they take your gear you get knocked back as if hit by unrelenting force.
Master Rogue
Usually attacks with a group. Hard to detect and is by default semi-invisible. If they are not attacked within 5 seconds of being close to you, they pilfer x amount of items from your pack, where x is your current level. They then run away. No NPC will aggro them while they are "cloaked". If you whack them, they become visible though - and in combat, they are just another dude dual wielding knives.
Knight of the Void
Bane of mages. Spells do not affect these heavily armored opponents. Even area of effect ones. Summons and zombies automatically explode into ash if they get too close to him, and as long as you are within a set radius he drains your mana passively - for every point he drains, he gains ten points of life (so by default the weakest one has around 1000+ HP). If you are a werewolf or vampire he does quadruple damage against you.
I like Ponty's giant idea. I feel like Bethesda could have done a lot more with giants than they did.
I don't have many ideas of my own, although I really wish the DB assassins were tougher. The ambushes should be harder to escape and the assassins stronger, forcing you to be on your guard more when wandering Skyrim.
I'd like to see something more water based like a mermaid or serpent type enemy. I'd also like to see Ogres make a comeback. they scared the hell out of me in Oblivion!
Another that would be really awesome would be if they introduced Centaurs, you could fight them from horseback or maybe befriend them and ride them, both of you swinging weapons at your enemies!
OMG THE TICK! Almost as awesome as Freakazoid.
Yeh i'd like Centaurs but only if they were given a credible reason for suddenly appearing; according to UESP they exist in High Rock and Valenwood.
Perhaps the Aldmeri Dominion were being assholes and drove them from their homeland to Skyrim where they now act like bandits?
I would like to see some new enemies, but in keeping with the lore. The Sload (uesp) would be an awesome enemy - a slug-like race that are powerful necromancers. Creatures from Akavir would also be cool to see, such as the snow demons (kamal - usep) or vampiric snakes (tsaesci - uesp). Personally, I would like to see the tsaesci as the major enemy in ES 6, such as an invasion of tameriel by akavir (my old discussion).