Wow, I can't believe how many people don't like You & I, I thought it was a great song on the BTW album but I'm guessing because it's not majorly 'pop' or Gaga-y, it wasn't so well received.
My worst Gaga song has to be Edge of Glory, it's so awful and the video is just crap - I can't see the appeal at all.
All-time favourite has to be Bad Romance, say what you like about Gaga but that is honestly one of the best pop songs of her reign. From The Fame, I loved Paparazzi and Love Game, wasn't too keen on anything else from that album though, IMO BTW is much better, apart from Edge of Glory and Hair (purely because the lyrics are just beyond terrible).
Currently loving Bad Kids and Heavy Metal Lover