I Wish You Would and Out of the Woods are the most epic tracks
Wildest Dreams is the most uninspiring, the worst song on the album
Out of the Woods is the song with the worst lyrics.
Shake It Off, Bad Blood, How You Get and Welcome to New York are obviously the most generic ones. Just because they're my favorites does not mean i can't notice the genericness.
Style, Clean, I Wish You Would and I Know Places are among the best songs as far as the production and general impression is concerned. Even tought Clean is not my favorite one.