Obviously since this is an MMO modding wont be allowed but if you could have any Skyrim mod, not a cheat, what would it be? Mine would likely be any of the "more craftable" mods as I like making custom gear that isn't overbalanced. Anything that improves the textures or looks of my character is also something I'd add in.

I haven't played TESO yet... so I have no idea on how I would want to mod it.

But chances are there will be a few thousand bugs that will need fixing, and low quality textures/meshes in some places.

Higher resolution textures, and a shader modification to allow the user to modify the way lighting works, and enable screen space ambient occlusion.

https://www.google.com.pr/url?sa=t&rct=j&q=&esrc=http://forums.bethsoft.com/topic/1440063-if-you-could-have-a-mod-in-teso/s&source=web&cd=1&cad=rja&ved=0CC0QtwIwAA&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DBifmj1O3D24&ei=hicIUfLGA4mC8ASE-oCoCw&usg=AFQjCNEsLccHgcw9NAFOBRBKij8CvDfgnw&bvm=bv.41524429,d.eWU

Remove faction/race locks, and neutral start mods.