I'm going to go with best since Pop. ATYCLB had some very resonant songs but some really shitty ones too, and I think the amazing tour paints a rosy color over my opinion of the album. Bomb has some great songs but lacks a certain guts and bottom end. It's just, not quite. NLOTH has a couple of absolutely killer songs but, you know. The middle three. Pop combined strong songs with a dirty, destructive, ferocious intensity that made it memorable, if not always pretty. SOI has a bit too much polish for my taste, esp. the front 3 but the process of getting one stuck in my head (which happens often) always results in me liking the songs more rather than less. It grows lyrically in particular. The lyric gains in gravitas and meaning with repetition rather than the reverse, a strange phenomenon that I find myself loving.