A mid-end card could run almost all of those mods, so I dunno what you're talking about. If you take a Radeon 7950, not even a 7970, it could run all of those. A Nvidea 760 could run almost all of those.

It's not so much as they are "ugly" as much as it is that they are unpolished. The textures for them are atrocious, as are the customization levels. If you look up a mod called Vilja in Skyrim, you'll see an example of what Bethesda should have done with their characters. She looks like she came from a harsh place, but at the same time she isn't nearly as bland as the vanilla characters.

Its not as bad as u think unless the pcs u are thinking of are like pentium 2s or something... The PCs that have a Nvidia 425M (which is a super entry level laptop video card) can even run games like BF4 on low-medium settings no problem (at 720p that is)

She looks like a rich woman with perfect skin who wants to play a viking on carnival 

That's a problem I often see with the modding scene for these kind of games. They make characters who have perfect skin, are beautiful or at least don't look like they have to work 18 hours a day on a field with nothing as a half broken rake made of wood or someone who is traveling around the country, sleeps under a tree or in a cave and kills monsters and bandits all the time.

Most are made to attract the potential downloaders of the mods which is pretty stupid to be honest. Most characters in such a game should disgust us for nowadays standards with dirty skin, missing teeth, scars and sometimes a missing finger or stuff like that  

Sure, some people could look great but most should look like their life is as hard as you can only imagine. The woman on the picture doesn't look to me as if she ever had to do anything with her soft hands except for polishing her armour. 

her hands should look like this

ENB? I don't think so. I can run most of those as well but ENB is something else, you need higher end cards for that.

There are tons of cities in Skyrim, and not everyone has a job that gets their hands dirty. There are mages, merchants, nobles, advisors, etc. who have no business being as dirty as that picture. A blacksmith or soldier, sure. Harsh environment =/= dirty hands.

That's why I said 

"some people could look great but most should look like their life is as hard as you can only imagine"

And even if Skyrim would have 10x as many cities, did you see what kind of cities that are and how people live there? What they have to do to get even the most simple stuff done?

Most of who you mentioned would still have to look much worse as they do in many mods. It's a world where it's hard to live in and also very cold  and just because you are a merchant and not a blacksmith doesn't mean that your life wouldn't be damn hard. Most characters even tell you about their problems and whatever and then they look like someone who got a nose surgery and who has a nice hot bath with the best shampoo in town twice a day. 

Don't tell me that the woman in the picture you posted looks like someone who really uses the sword she carries with her...or that she ever even had to kill a rabbit. Like I said, she looks lik she is dressed for carnival and not like someone who is regularly fighting against anything. It's not only about the dirty hands (which most should have in such a world) but also about the skin.

^Personally I think that modded Skyrim chick looks kind of creepy, like a Barby doll or something. I like ESO's character models personally, they look good to me, better than Bethesda's character models in Skyrim for sure, and they don't look as creepy as most of the character mods I've seen for Skyrim. I hope that Bethesda improves their character models alot in Fallout 4, and again in TES 6 in a few years, and not just the looks, but also the depth of customization, the characters in ESO are much more customizeable than the characters in Skyrim.