Ocarina of Time or Link to the Past are the quintessential Zelda games that really represent what Zelda is all about.
After that, I would recommend Wind Waker. I've heard good things about Majora's Mask as well, but it's the only Zelda I haven't played.
Twilight Princess is awfully boring. Really a weak entry, save it for last.
A Link Between Worlds is actually pretty great.







