Without rehashing this yet again, anyone who thinks about Sondheim that "a lot of his stuff is kinda the same (music wise)," has obviously not bothered listening to very much of his music. Please listen to the OBC recordings of "Anyone Can Whistle," "Company," "Follies," "A Little Night Music," "Pacific Overtures," "Sweeney Todd," "Merrily We Roll Along," and "Sunday In The Park with George" and see if you have the same opinion afterwards.
"JRB" at this point in his career, is not in the same class, though, he's written some very good music.
Sondheim's use of dissonance is more characteristic of "Sweeney," Passion" and some of "Sunday" and "Woods," but is not a characteristic of his earlier work. Nothing in "Company," "Follies" or "Merrily" should take anyone multiple listenings in order to sing along. Please listen to Sondheim's work, before making sweeping generalizations about it.
"What a story........ everything but the bloodhounds snappin' at her rear end." -- Birdie
[http://margochanning.broadwayworld.com/]
"The Devil Be Hittin' Me" -- Whitney