So I finished Dragon Haven (Spoilers)

[Liquid Ice]

It seems everyone has some Skill ability in them, seeing as they can communicate with dragons. Though it's more latent power than anything, as they don't seem to have much experience using it consciously, so I suppose it could be dangerous for them to use it.

However, I also remember Fitz using the pillar when he was still struggling from Elfbark withdrawal, so I don't think one has to be at the level of a Skill master to use it. But there is also the time in Fool's Fate where Fitz was trapped in some sort of netherworld because he didn't have the reserves or something. I'll need to look that up.

I wonder if dragons can use the stone pillars the same way the humans can. If they form a close enough bond with their keepers, would that be enough for them to travel through the pillars safely?

Well not everyone can communicate with dragons. Sedric for example. And the dragons said that was because he was "stuiped". Or something around them lines. Though from what I've gathered alot of people can. Or at least hear them.

And also one thing that really bugged me is Fitz seemed to have little trouble using portals but when he met... whats his name? ("The black man" that was like The Fool). He made a big deal about it saying things around the lines of "You should use them as little as possible" and he also was amazed when Fitz told how many times he had used them.

So I'd say either Fitz is special in his powers or it was kinda something the Author thought of late.