One 100% Snape!!! The only reason I read "snarry" is Snape - and Harry is the only partner I like for him. I could never read any pairing that has no Snape in it.Oh, wait, actually AS/S I like, but only when the story also contains snarry. :-)
For me it's all about Snape. I read HP fanfic because of Snape. Of course I enjoy reading about Harry and I do very much like his friends when they are present in fics. But it's all only because of Snape; take him out of the equation and I would not be reading in HP fandom at all.