No Votes for Link's Awakening or Adventure of Link? Sad panda..
I liked Zelda 2 Adventure of Link just because it was so different and quite challenging. Link's Awakening was the first gameboy game I believe for Zelda series that had you stranded on a foreign island.
The NES ones and Link to the Past are the best to me.. But I'd imagine peoples choices are just based on which ones they enjoyed the most when they were growing up. So if you were born in the 90s, you will probably like Ocarina of Time, etc.