Secondary characters -- Love 'em or leave 'em?

Let's talk secondary characters...

Do you bother reading fanfiction that includes them? By secondary characters I mean;

Justin Finch-Fletchley
Susan Bones
Zacharias Smith
Michael Corner
Malcolm Baddock
Terry Boot
Roger Davies
Morag MacDougal
Hannah Abbot

And the dreaded 'thou shall remain sexless' Blaise Zabini!

Me -- I pass them up. Couldn't be bothered. I don't see the appeal.

How does everyone else feel?

Oh, and if you're 'pro' on this issue, rec me some fics?

--P