All Too Well may be my favorite song ever, so Red is a strong contender for me. Looking at the track list, there is some forgettable stuff on there though. I think that's a product of just how big an album it is though, you're going to get some filler. 1989 has some real highs with Blank Space, Style, New Romantics, and Clean... buuuuut it also has Welcome to New York, Shake it Off, and Bad Blood. All Too Well may be the best song she's ever written and Bad Blood may be the worst.