Smile was the album that led to Brian Wilson’s crackup and to a huge fight with his band mates. It was shelved and partially salvaged as Smiley Smile. Smile wasn’t released in the form desired by Brian until the 21st Century. It’s quirky, odd, and more like Zappa than the Beach Boys at times. You’ll note that the verses of Good Vibrations have different lyrics than the hit single; they were written by Van Dyke Parks who wrote all the lyrics for Smile.
Here’s some Sunday morning lagniappe, Brian and his band playing Pet Sounds live: