Well, how you use it is completely up to you.
I have blocked all game requests, so that's one thing! Then, I have all these bands, concerts, local gigs that you can track easily over Facebook. You can use it to share events, photos, notes, links to interesting websites, etc. and so many other things. Facebook Connect is useful as always, you don't need to sign up for those forums and websites which use that, its a one-step sign-up and sing-in process. I have my Facebook connected to my Google, Youtube, Twitter accounts and everything is pretty much in-sync. All my friends who have their numbers, email addresses, DOB, etc. up on Facebook, gets transferred over to my Android phone over the air, in real time and well, I could go on but you get the drift. Obviously, I hate the spam and when all people do is talk about an Online Social Networking website. :\
Now that I have moved to a different city, Facebook is all the more helpful. Maybe not the case for everyone.