I fell asleep the first time, my wife didn't.

On her side, she was much more of a Tolkien nerd at the time, though I think I've surpassed her (an indictment of myself, I assure you).

For my part, I was burned out from classwork and did not experience anything from Moria to Amon Hen. Like, I didn't even remember that I fell asleep - or rather, waking up. So it wasn't until I saw it again that I realized I missed Galadriel and a whole lot else. This exacerbates my confusion about what's in the theatrical/extended, to say the least.