*nods* Yes, I agree totally about 1st-person canons. Also, for that matter, 1st-person OCs, which zillah975 mentioned above. A couple of my favorite SGA fics are 1st-person OCs narrating an outside POV of the characters. But once you take it inside the characters' heads ... my brain has a lot of trouble coping with that.

I think another exception is letters and diaries, especially if they're interspersed with regular narration. I can think of fics that have used that to great effect (and I've written some myself). But just straight-up 1st-person narration ... I think it's incredibly hard to pull off for a TV canon.