Dream Land on the original Game Boy, I'll be honest alongside Mario Land 1+2 I didn't really like it, I mean it was okay, but the Mario Land games were just portable gaming perfection imo.

Still have my old copy after all these years of traveling about with me :)

Kirby Squeak Squad on the DS! :D

The Amazing Mirror was the first Kirby game I played so it was on the GBA

Kirby 64, rented it a few times I think.

Never played any.

Kirby's Dream Land for the Gameboy xD

Kirby's Adventure on NES.

Kirbys adventure on the 3ds virtual console.
I'm not quite sure it really clicked with me though.

The only Kirby I've played is Kirby's Epic Yarn for Wii and I found it cute and enjoyable but pretty easy (and I say that as someone who is generally not very good at 2D platformers...)

Crystal Shards on 64 was my first exposure to the series and I absolutely loved it, but I didn't own either the game nor the system. Later on although I didn't actually own a Gamecube I still got Kirby AirRide and loved it, and when it became apparent that the GCN wasn't getting a true Kirby game, I put aside my dislike of handhelds and got a GBA solely for the amazingness that is Amazing Mirror, the first and only time I'll ever buy a system for one game!