I REALLY WANT TATTOOS!!!!!!
I hope they make a return. I remember in Morrowind the Dunmer and Nords had face paint on some of the faces, which I thought was awesome. So probably not 'tattoo', but face/body paint would be nice. But pre-set's would get slightly annoying. Though PC mods would fix that. If they put in body/face paint, I hope they also add a system like in Call of Duty: Black Ops. What I mean is, you can pick pre-set images, and layer them over each other to make new images, and edit the images also. Like an 'A', then you can rotate it, choose it's color, scale, and move it around, then you could put an 'O' on a layer behind the 'A' and then you would have something like a (A) image. Best I can explain it... Like if they had like an image of a snake, and one of a dragon, you could make it look like the dragon is eating the snake, or whatever.
And obviously they will have new hairstyles, graphics have been improved so much since Oblivion. I think Facegen will be completely different too. It's on a new game engine, unlike Oblivion and the Fallout's. I doubt the difference will be like going from Morrowind to Oblivion (graphics wise anyways), but it will be a great improvement I'm sure. I have faith in Bethesda. They'll do what other game dev's are failing at: Making an Awesome new game! (Not to sound rude to other game dev's, but to me, most games that have Sequel's are almost the same. Elder Scrolls was/is different than that.)
edit: And yeah, I think there should be restrictions on certain races. But however, I think any race can get fat, or skinny... I don't know much about the lore, so I'm not positive, but if an orc did nothing but tend to his store, and eat, drink, sleep... Well, I want to see a fat orc!
Not too fat, but very noticeably fat. And I want to see beggars who are very skinny due to a lack of food, I mean so skinny their clothes hang off them (though that may be a clipping problem, or other game engine stuff.) Wood Elf's should only be able to reach about 5'6 (5 feet, 6 inches). Whereas Orcs and Nords can be as large as 6'6... But only be able to go down to about 5'6. I imagine Argonians can be very versatile in their height/weight, but I could be wrong. Well, anyways, Bethesda will do a good job either way