I've just crossed over into the nerdy point of no return and started writing a journal as my newest Skyrim character. It's actually pretty satisfying and helps me stay in character while playing (I like roleplaying but sometimes get sick of the more mundane aspects as I've played the game with only small breaks since it came out.)
I've seen a few mods that let you write in game, and I've seen a couple hand-written examples like http://imgur.com/a/06q4x#0 (this person is like a nerd's nerd... pretty awesome).
I like it because since I'm playing as a real person (sort of myself actually) I can write whatever I want. Personal anecdotes and such. Again, it's fairly refreshing to this oldish game. I'm thinking of posting mine online, wondered if anyone else here does that and where I could read it.