Facebook for BlackBerry is great except if you're constantly receiving notifications that you don't care about. — Since not all of the notifications on the website are supported by email and BlackBerry anyway, here are the ideal settings that I've found to limit what you receive:
Perfect example of why changing these settings is important: Let's say you've commented on someone's photo that they've just posted. — You'll be receiving notifications on your phone every time one of their friends who you don't know comments on that particular photo, even if you do not know the person commenting.
… That's why I've unchecked “Comments after me in a photo”, but left “Comments on my photos” and “Comments on a photo of me” checked.
Feel free to tweak these settings as you so desire. — You'll still receive notifications when someone invites you to an event, cancels or changes an event, sends you a message, or adds you as a friend.
Bonus tip: Delete the emails automatically
Go into the Facebook app's options (on your BlackBerry) and make sure that “Leave email notification on mail server” is unchecked. — That way, your BlackBerry will delete the email from your inbox after it has notified you.
You won't have to delete a bunch of Facebook notification emails later on. 👍🏻