Everything.
I can manage about 5 pages of any book. I think I've read 2 in the last 5 years. Am really hoping this year is the year I get it back- I've got a houseful of books I once enjoyed, and shelves of new books I'd like to read.
This.
I'm not entirely sure why.
I've struggled to read fiction for many years now. Non-fiction's easier as it's more easily read in small doses, or you have a specific incentive to actually read it in order to learn how to get something done.
I think some of it's about ergonomics - I can't read in bed for more than an hour or so without shoulder pain, and don't have a comfy armchair any more. Dead tree books are doubly irritating in this regard, with their weight and self-closing habits, though I'm equally crap at reading ebooks. I'm disinclined to start if I'm only going to end up having to stop after a short time because of pain, or (if it's a decent book) bugger up my shoulders through keeping reading.
That, and audio books are expensive, and often read 'wrong' with jarring accents and the like.
Audio books are a work of Stan, unless you're one of those people who can listen to recorded speech in a moving vehicle without getting travel sick. I don't get why anyone with normal reading ability would want to have something read to them at a frustrating fraction of the proper bitrate, even if it was in the delightful tones of Stephen Fry or Morgan Freeman or similar.
Oddly, radio drama doesn't annoy me. Though it still makes me travel sick.
And yet I'll read vast swathes of random (and I do mean random) crap on the internet. General wiksand; NASA reports; fan fiction (of fandoms I don't even know); academic papers; WW2 submarine manuals; reviews of books I know I'll never get round to reading; websites, usenet and forum posts about all sorts of things I have no specific interest in. I lurked on uk.business.agriculture for months, FFS! I'm reading as much as I ever did. But not proper books.
I think it's related to why I haven't played computer games (other than a couple of hours of Portal) in the last decade. Sure, some of them are quite good, but in doing so there's a world of interesting *real* stuff out there that I'm neglecting. It feels like the information equivalent of people who grew up post-war being psychologically incapable of not clearing a plate.