I really like Varys. I think he's underrated. At least, there's no big Varys fan club that I'm aware of.

We saw quite a lot of him early on, but he's dropped off the radar a bit since then, particularly recently. But, I think that suits him just fine.

He's at his best working away his Machiavellian schemes behind the scenes. So, although I think he's underrated, I wouldn't want to see him getting much more screen-time.

Why I really like him, though, is that I really think that he's got the kingdom's best interests at heart: he's not in the game just for himself, unlike so many of the other courtly characters.