Short answers, pulled from the story.
Taylor Swift has won Album of the Year four times as a performer, for Fearless, 1989, Folklore, and Midnights, more than any other artist. As an engineer and mixer, Serban Ghenea holds the record for total wins in the category with five.
Judy Garland was the first woman to win Album of the Year, taking the award in 1962 for Judy at Carnegie Hall.
Lauryn Hill's The Miseducation of Lauryn Hill, which won in 1999, was the first hip hop album to win the Grammy Award for Album of the Year.
Billie Eilish is the youngest main-credit artist to win Album of the Year, winning in 2020 at age 18 for When We All Fall Asleep, Where Do We Go? The Peasall Sisters, credited on the O Brother, Where Art Thou? soundtrack, are the youngest individual winners overall, with Leah Peasall winning at age 7, the youngest winner of any Grammy in any category.
Frank Sinatra won in consecutive years, taking the award in 1966 for September of My Years and in 1967 for A Man and His Music. Stevie Wonder matched that feat, winning in 1974 for Innervisions and in 1975 for Fulfillingness' First Finale. Lauryn Hill and Bruno Mars each won in consecutive years with one win as artist and one as producer.
From 1995 to 2021, Nomination Review Committees of anonymous members screened the top twenty vote-getters and selected five nominees. In 2021 those committees were disbanded, and the full membership vote now determines the final nominees. The field expanded from five nominees to eight in 2019, reached ten in 2022, and returned to eight beginning with the 2024 ceremony.