I have always loved both the script and score for FOLLIES since I first heard the cast album and read the script when it was first issued in 1972. I liked it so much I went and got the album of COMPANY. Now, my family had all the classic musicals (MUSIC MAN, HELLO DOLLY, CAROUSEL, etc) and I loved those too but COMPANY sounded new and exciting to my 12-year-old ears.
These 2 cast albums plus the double LP set SONDHEIM: A MUSICAL TRIBUTE made me a fan. I eagerly purchased each new cast album as they came out: A LITTLE NIGHT MUSIC, PACIFIC OVERTURES and then came SWEENEY TODD in June 1979. For me it was the show that blew everything else out of the water. To me, the apex of modern musical theatre was SWEENEY. It is to the last half of the 20th century what Gershwin's PORGY AND BESS was to the first half.
I have not been disappointed by any of his shows to date. SUNDAY and PASSION were both very moving. INTO THE WOODS, a delight. ASSASSINS, chilling and thought-provoking.
Other shows I enjoy repeatedly listening to are usually those with strong texts: EVITA, CITY OF ANGELS and THE GOODBYE GIRL (both have lyrics by David Zippel), RAGTIME, LES MISERABLES, A CHORUS LINE, CHICAGO and most Kander & Ebb shows.
Cast albums are NOT "soundtracks."
Live theatre does not use a "soundtrack." If it did, it wouldn't be live theatre!
I host a weekly one-hour radio program featuring cast album selections as well as songs by cabaret, jazz and theatre artists. The program, FRONT ROW CENTRE is heard Sundays 9 to 10 am and also Saturdays from 8 to 9 am (eastern times) on www.proudfm.com