He's not my cup of tea, but obviously a lot of people liked him since he sold well. I enjoy the review of him in the Rolling Stone Album Guide:
"Perhaps Vannelli reached his nadir by wailing the ludicrous lyric, 'I'm just a male Caucasian' to overblown synthesiser accompaniment on Storm at Sunup, But for this schlockmeister, 'nadir' is a relative term. Virtually his entire career has been a progression from valley to gulley, and he qualifies as an absolute Il Duce of bad taste."
It goes on in this vein, amusingly so, or irritatingly smugly so, depending on your taste.
No offense meant (hollow protestation, obviously)