This is my all time favorite of all Zelda games. I just love playing it (finished the game several times).
Traveling through the worlds, fighting a lot of bosses which aren't implementet in any other Zelda games and having a pretty high number of dungeons compared to many other Zelda games. I also like that the world map is not that big but still has a lot of secrets, shortcuts and side quests, it makes thinks a lot less frustrating if you have to travel from A to B.
Anyway I rarely see anyone writing about it or saying it's a good game.
If you talk about good Zelda games it's mostly only OOT, MM, WW and TP since those certainly are great games but I think A Link to the Past is just a supperior classic.
In the newer GBA version you can also access a bonus dungeon with new, harder bosses and fight the 4 Links from Zelda: The Four Swords Adventures, which is a pretty fun thing to to.
I'd like to hear what people think about this game, since there are rarely special topics about it out there.