I tend to like silent protagonists, they're mysterious nature and the thousands of ways you can interpret them is fascinating to me, of course there are exceptions like Joel from The Last of Us. Sometimes though, I wish they did talk such as when you play the rest of the characters from Mother 3. I understand Lucas and maybe Flint, but I do think I'd be more interesting if we got to see how Duster felt. I think this decision was made because it's meta.
But if I had to pick... It would probably be Link from TLoZ! It's one of the first games I've ever played, he's very simple but there's also a lot that we don't know about him that people could theorize about.