I read all the books that I didn't already read in Morrowind or Oblivion.

I read skill books, and books about things I'm interested in. Factions, Daedra, etc. I mostly just read people's personal accounts and scholarship, and rarely take time to read heroes stories and the like.

This so [censored] much, I hate the song books.

Also, there are books I'd like to read but won't until I can get each edition in the series, which is usually hard to do.

i usually read the first paragraph at least, if it sounds boring i chuck it in my loot sack for mercantile purposes when i'm back in town

I read the ones on conjuration, alteration, two handed, heavy armour and anything I think is major. For example "The great war", "Troll killing" and "Cats of Skyrim".
I like to know why I'm getting a level up, also I learned never to accept gifts from demonic beings. (Besides daedric princes)