The sponsored posts that look similar to normal user 'likes/shared' posts, the 'Friend has just accepted an offer' posts when they haven't, the 'Pages you may like' ads that appear in the mobile FB app ... to me, it feels grubby, deceptive and invasive of my user experience.
I know FB has to make a profit somehow, but that's really not my problem - I can only rank a service on my user experience, and FBs is sliding downhill. It's been said by others that Google Adwords has been so successful because it captured intent and context. I also think it was successful because (for the most part) it was non-disruptive to the overall user experience on the page it was displayed. The ads were reasonably discrete and clearly defined.
FB's approach of 'disrupt' or 'trick' the user into clicking on ads seems like a throwback to interstitials, pop-ups and other dubious methods. I can't see this as being a good approach and believe this will only hurt their user base (and stock price) in the future.