Something I'd enjoy, and I think a lot of others would enjoy, is a Klingon mod.
I'd be personally be happy with a Klingon race(since the only mod like it was never completed), since there is already a Bat'leth weapon mod(though it would be cool if it has some variants). Pretty much just a couple of different sets of forehead ridges and a fu manchu and you're golden.
It would also be cool if there was a Klingon disruptor you could use, since gun type stuff in Skyrim is pretty fun. I don't really need Klingon armor, as a lot of the normal Skyrim armor sets would work quite well with them I think.
I should probably see if there is a mod that lets you have a Solstheim boar as a pet, since it would make for a decent Targ.