Now that I'm back on Facebook, I have a few comments to make: 
  1. I don't respect people with joint Facebook accounts, like MikeandJen Jones or whatever.  Not only does it go against how Facebook operates, but on a philosophical note, it kind of demonstrates a lack of individual identity.  It makes it seem that two people think of themselves as a joint person, and not in a romantic kind of "inseparable" way.
  2. I think it's dumb when people use a picture of their kid or their pet as their profile picture.  The whole idea of a profile picture is to show a picture of yourself.  Post your kid pictures on your wall or as your cover photo.  Your profile picture sort of represents who you are, so using a picture of your kid says that you see yourself primarily as parent, and after that as an individual.
  3. There's a "Like" button, but I think there should also be a "Dislike" button, so you can easily express your dissatisfaction with something.  However, I think it's interesting that Facebook made it easy to express a positive emotion and not a negative one, which seems to imply that fostering community is more about positive things than negative.
  4. I think there should also be a "Love" button, because sometimes you really really like something.  But every time I say "love button" out loud, it sounds awkwardly sexual.
  5. Liking a page subscribes you to that page's updates and posts.  Checking in at a location doesn't have the same effect.  It seems like that would be a logical thing.  I could be wrong.
Obviously I'm an expert.