Davy Vain is one of the worst vocalists I have ever heard. I can't stand listening to him. That's why Vain is terrible. I don't know man. I haven't listened to them in like 10 years. Maybe my tastes have changed in that time. I highly doubt it though.
I must defend Lancia. Pain Sweet Symphony, Still in Love, Sweet Melody, Goodbye, and The Promise are all killer songs. Poetry In Motion and Wrecking Ball are highly underrated. The rest are solid, even if Jimmy is a bit cheesy. You can't deny the greatness of Paul Lancia's vocals either.