G1 and G2 are both very tough (3 and 4 easy peasy for me).
I have such mixed feelings about the White album. What's good, is very good, and what isn't... REALLY isn't. They could have made the white album a normal 2-sided album and it could have been one of the greatest pieces of work ever. instead, I find it to be watered down with "we're the ****ing Beatles and we can get away with the most ridiculous shit and we're going to prove it to you by filling about half of this release with junk".
So, with that said, the half that's good is so cool, The half that sucks, really sucks.
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As for group 2... I am leaning towards PF, but can't quite decide yet, love both of those albums dearly.