Normally, I would not consider buying a HD collection or remakes. Apart from Ocarina of Time 3D, most times, I see these ports or remakes as quick money grabs. Money is tight, and games are not cheap, so being selective is essentials. Of course, Ocarina of Time 3d and Wind Waker HD were made to make money for Nintendo, there are no other ways to spin this, but at least some effort was made to improve the experience.
I have read a few comments in recent times speaking of scepticism around purchasing The Legend of Zelda: Wind Waker HD for the Wii U. Understandably, not all people are going pay full price for a remake of a game that they have already played. However, in my opinion, Nintendo has made enough improvements in The Legend of Zelda: Wind Waker HD, for a familiar gamer to sail the Great Sea once more.