I'm also a three era guy. Early - through Revolver Mid - Pepper & Mystery Late - White Album through Abbey Road If, for the sake of this thread, I was to split it into two eras, I would combine Mid & Late, with Early still going through Revolver. With all of their tremendous success, Revolver feels like the culmination of their youth, to me. It's everything they've learned, including the freedom to experiment, bundled into one album, but not so completely advanced from anything prior. Taxman, for all it's rocking, still has a shuffle (skiffle) feel to it. The opening guitar lick to Sgt Pepper feels different. It's like a mission statement, "We are grown." This is where a band that has access to all of it's tools and faculties emerged.