I've always enjoyed Let it Be, sure it's not a s great as the rest of the catalog but it's an intresting listen which never gets boring for me. My favorite tracks are Two of Us, I've Got a Feeling, Let it Be, The Long and Winding Road, One After 909, and Get Back. I don't understand why Don't Let Me Down wasn't on this album, it would've made the album better in my opinion.
As for the The Beatles Again LP (which was issued before Let it Be came out), I too love it. Any album that includes Rain, Lady Madonna, Hey Jude, and Don't Let Me Down is a winner in my book. It was released as a cash grab by Allen Klein in between the releases of Abbey Road and Let it Be. I would've added a few other tracks like There's a Place and The Inner Light, it would've made the compilation a little cooler.