I'm like that too. When I find stuff interesting, I usually just remember the main details/gist of it. While I will tend to remember facts about it if it's wild/unusual/main part of the story, I don't remember many of them as I tend to skim through the boring stuff.
I appreciate when people take the time to only pass along the important stuff. I really hate it when my mom or aunts will forward me any crap that crosses their inbox that some other idiot didn't check to see if it's even true! It got so bad that I told them to stop forwarding me anything... No, Microsoft is not having a lottery and chain emails are not real!
Pet peeve: Massive email forwarder (usually person who newly discovered the email forward button... there should be a test you have to pass before you're able to unlock that feature!)