I guess it is an interesting question. Why do we think Link turning into a wolf suits him or not.
It's not that I think there are better animals for Link to turn into, it's just that I think turning into an animal at all is dumb. [...]I mean, I guess you could make the argument that he's faithful and loyal? But really, link doesn't have that much of a character. He's a silent protagonist.
I think the silent protagonist has been given more of a set emotions in the newer games. probably OoT started the fad with the gaps. Now we actually see Link getting angry or scared. It is not longer just us projecting our own feelings all the time, cutscenes really break that sometimes. 
So I guess you could argue some sort of traits have been starting to show up. Why a wolf? I don't know. I don't think tehre is much to connect it. The game went the easy way "You're s special snowflake" route. Everybody else is just a spirit living in fear not aware of their own situation. Link is special though, so he's a wolf and is aware of the Twilight spreading.
Another thing I might add is Twilight Princess promotes the entire theory of Majoras Mask Link dying... Yuck.
Is that so? I thought that it actually discouraged it. Maybe we should make a thread and discuss this.