Ocarina of Time was the first Zelda game I played. So somewhere inside that will always be special to me. But A Link to the Past is really more of a enjoyable game. I even really like the first Zelda. So you see... I can't exactly pick ><

The one I played the most over and over till I got everything there was to get was Zelda and ALttP. Of course I played ALttP over more times then I can remember.