Just what you mentioned - the excessive need for attention. Why do people have to text every thing they do all day long: "I am eating lunch." "Just went to Walmart." "Just put the dog out." Big deal!
I can't imagine thinking the people would be interested in every little thing I do. That is what I hate about it - it seems to either make everyone so danged self-centered or it brings it out of people.
I was reading Yahoo news one day and a sidebar came up that told me the news articles some of my friends had read...WHAT? How invasive is this stuff?!!
I have deactivated my Facebook account many time, then reactivate. Stupid! Another thing that bugs me is they don't let you delete the account, just deactivate it.