Kirby 64: The Crystal Shards. It had a great story and had the epic return of Zero in the form of 02 (and no I don't mean oxygen). It had the copy ability combining option which was amazing and I hope to see it in a later game.

I also loved 3d classics: Kirby's Adventure. I start out and already I was drawn into the game. I saw all the various copy abilities: Tornado, fire, burning, freeze, ice, spark, fighter, backdrop, UFO, etc. And I knew I was in for a treat. For an NES the soundtrack was amazing, especially Rainbow Resort. That song still sends chills down my spine. That world had a really unfitting title in my opinion. We had challenging boss fights against Meta Knight's Minions and then he himself, Mr. Bright and Mr. Shine, the hilariously easy whispy woods, and a surprisingly hard boss fight against King Dedede. Then the incredibly hard final boss that left our fingers fatigued and broken from tapping that B button and finally defeating that floating ball of a first form. Then I beat him, cheered, and realized that I wasn't done. I pressed hard and pushed forward and beat the game 100%. Many lives were lost and I searched the game over for secrets and got them, and I felt so good for finally beating a game 100% for the 1st time in my life. Then I got to Hard Mode and basically raised my hand and said "nope" and with a fresh sense of accomplishment turned off my 3DS. I had a great time with this 3D remaster and hope that many others do to. I recommend this to both hardcore and casual gamers. I feel it appeals to everyone, and that is a good quality for a game to have. You can just feel this game's quality and people will be for many years to come.

I'm always old fashioned when it comes to questions like this. I would have to say my favorite Kirby game ever is Kirby's Adventure for the NES. Of course it was the first Kirby game I ever played and its also my favorite. A lot of other games for the NES were my favorite games ever. Playing NES games will just never get old for me, I guess.