So, what is your opinion on the Greybeards?

They be old

I like them, but I didn't like the fact that they just wanted to completely sit on their hands about Alduin. At least we are able to talk them into helping us though, thats more than can be said about the Blades.

I don't care for them.

This. ^

I think they're a little too accepting of the "end of the world". It's easy for them to take that attitude though because they are old and live with a bunch of dudes who don't talk.