[Mac Sirloin]

Well Mike Patton is quite easily my favourite vocalist, but I love FNM because I love FNM. I own and enjoy Introduce Yourself (the album before he joined) and think The Real Thing is their best work (the album which he had no musical contributions to whatsoever). He just happened to make a great band even better, but I also often wish he hadn't taken them away from their original funk metal sound, or made Jim Martin leave the band.
Similarly to you, OddjobAbe, I think that the other members of Mr. Bungle are all on equal grounds on their respective instruments and creativity to that of Patton's vocals, and if the band had gone on, for example, without Spruance; it wouldn't have been anywhere near as good.

I find that many of the more instrumental heavy songs are my favorites, but I still love Patton's voice.