This is all anecdotal, but frankly I have noticed a serious decrease in Facebook's quality since their IPO. More often I have ads thrown (not so coincidentally) at the top of my feed, and I feel like Facebook has practically started begging me to 'like' various companies' pages.

Also I've seen and endless amount of meme pictures. Surely this is related to the people I'm friends with on Facebook, but I know I'm not the only one who is being bothered by this.