Plastic Ono Band is usually regarded as a minimally produced masterpiece, and I'm jumping on the overrating wagon as well. Here's my review...
Mother. Believe him or not, I see this as John crying his soul. The words are simple, direct, and yet cleverly used. I can't help but being moved by the ending with John shouting "don't gooo". Thanks God I had a loving father and a loving mother, so the spirit of the song may not touch me as close as others; but when I lost my father last year, I had that "don't gooo" feeling deep inside me. I miss him a lot.
Hold On. Somehow this song never reached me that much, but the message is nice and slightly more optimistic than most of the album.
I Found Out. Funky song with bitter lyrics. It still reflects how John was feeling at the time: you just can be helped by yourself.
Working Class Hero. The ultimate protest song. Those words don't need to be accompanied by more than a rustic acoustic guitar.
Isolation. Kind of a confessional song. It seems a pretty hard work trying to change the world by looking only inside yourself.
Remember. The message here seems to be "remember to forget". Good piano driving, though the melody is quite repetitive.
Love. A sweet ballad with nice and direct sentences. A masterpiece despite of (or because of) its simplicity.
Well Well Well. Back to the raw sound. I like the atmosphere of the song, but it's quite overlong and the lyrics are not that interesting.
Look At Me. Another simple ballad with simple lyrics. I really like it. The comparison to "Julia" is fair, but I don't care about that.
God. This song is the best photograph of John at the time the album was made. The first line "God is a concept by which be measure our pain" is interesting but not easy to be interpreted. To me it makes sense from the fact that love carries pain. Then the famous "I don't believe in my old idols" lines come (though surely Hitler wasn't his idol), because he just believed in himself (and Yoko), as his inner reality grew beyond the outer world. As a Christian, it's neither nice for me listening to John singing "I don't believe in Jesus", but this mention is no more than a proof of how obsessed he was with Christ during his whole life. But Jesus is not an idol, He's actually an inner reality, and when John stopped believing in himself in a hotel room in Tokio he opened the door to Jesus again, or at least he was moved to write this song:
My Mummy's Dead. Sounds like a home demo, and probably the record didn't need this, but it closes the album as a circle. This is certainly a concept album, as it has been said in this thread.