You can all hate me, I've never played Link's Awakening. Never played any of the GBA/DS Zelda's either, but that one seems the most like blasphemy. I have it, I just never got a Game Boy and I haven't hooked up my Gamecube/GBA Player in a long while. But I will.
Zelda II might be my least favorite but I think I've actually played and beaten it the most. For years that was the only Zelda game I had (and one of only like, 4 NES games I owned at one point) so I played it often even though I had NO idea what I was doing. I can only get through it with a guide, but I like a lot of what they did with it, the Castles and boss fights especially, and I love the music. It is hard, especially near the end, but if you are very patient you can rack up lots of extra lives in those fields full of fireball-shooting spiders. Risky, but worth it.
GK, that looks similar to the sword I got, other than the retouching, obviously. The ribbons on the handle are a nice touch. Other than polishing I haven't done anything to mine yet. I cleaned one side too hard and part of the Triforce engraving is worn, I'm F'n stupid.