"Every time I hear him, I think of Celine Dion: technically talented, but just absent of any emotion or interpretation. "
He's better on some songs than on others. His version of "Bring Him Home" does show a fair amount of emotion. But I don't see how he could ever play Val Jean on stage--he doesn't have the acting chops and he's completely the wrong "type".
Has he ever done a musical other than Chess? I heard a rumor that he was going to do "Oklahoma" at the Chicago Lyric Opera, but that obviously didn't happen. In any event, he does have a gorgeous voice; I just wish he would get away from the David Foster influence on many of his albums (bland arrangements of what are at best mediocre songs).