Misfits > Danzig > Samhain.
Misfits w/Glenn was orgasmic, huge huge fan. Danzig is quite awesome too, though after the 4th album things kinda took a wee-dip. Never heard Samhain so yeah. I also liked the American Psycho/Famous Monsters albums. I mean hell, Michael said so himself he's not trying to duplicate Glenn's vocals and that'd it be something new and he was right.
That and I was first introduced to Misfits via Famous Monsters, so I wasn't a purist from the 80's pissed off at its re-encarnation. But yes, I find Michaels vocals very smooth and really joined both those albums.
That being said, The 'Misfits' that are being paraded around now are disgraceful. Jerry Only's position is very similar to Axl Rose w/Guns'N'Roses. Just change the name and run w/it. Don't drag down the G'N'R/Misfits name with you.
Oh, and I see Danzig live September 10th. Cannot fucking wait!!!