I think the games are fine the way they are, but voice acting could be good too.

they need to go VA. Look at all reviews about the previous zelda. It lost points because it didn't have VA.

What it needs is an option to turn it on and off and leave the text there too.

Not hard. Keep the traditional and the new audience both happy.

Adding voice acting to established characters sounds like a bad idea. We all have our own ideas about what these characters should sound like, and no voice actor could meet everyone's expectations. If they were starting a new Zeldaesque IP, I'd say go with VA, but it just can't work in Zelda. Remember what happened to Sonic? That was partially due to terrible voice acting.

but should nintendo care what critics say, or what we say?

Eh, if they want voice actors for the Japanese version, they could hire them from the anime industry.Somehow, i can imagine someone having the ideal voice for every character.
For the English versions, im afraid it wont work out that well.

God no acting voice or atleast japenese voice acting only ^_^.

I certainly don't want any ridiculous japanese voice acting in Zelda. That would ruin it completely.

Midna's gibberish was quite likable.

^ Oh yeah, ridiculous voice acting,like in the Studio Ghibli movies, or Cowboy Bebop, or Grave of the Fireflies. I was talking about professional Voice actors, who beat the snot out of the celeb voice overs of the average hollywood animated movie.

^^
Compare the two voice acting of the SF IV " japanese & english " I think you'll find that I'm right somehow.

and of course if you've watched the Naruto & One Piece series in their japenese you'll have some ideas about what I'm talking about I'm not talking about the Japnese SNES commercial come on !