Social Networking, in my opinion anyways, is supposed to be about..ehhh...socializing. That should include me being able to be exposed to new ideas, new people, new opinions, and likewise being able to express my ideas and my opinions. I think one of the big problems that we've seen with the new Facebook, and resulting decline in Widgets, is they took away a large portion of what allowed people to be different on Facebook. I will admit I use Facebook for only 2 purposes... I use it to play Mobwars (a random and pointless game) and to chat with my friends (not via messages but that IM program in that handy little bar at the bottom of the page). I don't ever visit anyone's profiles... I've had a hell of a time trying to find groups and such that are interesting to join, as with pages. I also am blessed to be able to see everything my friends are doing... hello Stalkerbook.
Facebook it seems, is becoming a mere screw around (time sink) and basic communications system. Even the communication aspect I don't think will last as more people get SmartPhones and are able to use features that are becoming increasingly cheap to send text messages. We're left then with a time sink... At least at Myspace we can be expressive...and find new music, new groups...