I use facebook, purely for keeping in touch with friends and to see what they're upto, but I don't LIKE Facebook, it's...I don't know, always seems very buggy
I frequently get messages about how an operation couldn't be completed, or how I've got a pending message, but there is no pending message.
Not to mention the annoying interface, you click a persons link/profile and it says there's no wall posts, or no new updates, yet five minutes later, there's suddenly a whole bunch you didn't see before.
Uploading pictures is a pain in the rear to, as they don't expand to their original size, nor can they be enlarged.
Gah.