Sufjan.
The Decemberists are brilliant. I can see where the vocals can irritate people, not unlike Morrissey in that sense, or even Dylan. But being polarizing is not the same thing as overrated. The acclaim for this band is legit. Walking out on them? Bizarre. One of the more solid shows I've seen. Same for seeing Meloy solo acoustic at Iota a while back.
Sufjan Stevens... boring. Just boring.