He's one of my least favorite characters in canon.

*shocked face*

I'm not sure we can be friends anymore...

=P

But, more seriously, I kinda know what you mean. I love canon Snape as a character - he's a dick and I really like that. But when it comes to fanon Snape, I'm quite particular. I like it when he retains his dickishness, rather than simply becoming this misunderstood, byronic-hero character. Or AU fics when the war is long over and everyone is grown up (both physically and emotionally), since he is kind of emotionally stunted...

Eh, different strokes and all that. =)