It's been a long time since I've played a game that's fun. I owned a PSP for a short while, it had so many little annoyances, and the games were total rehashes of other games with the exception of lumines, and lumines isn't fun.
So I sold that pile of junk on eBay and bought a Nintendo DS with Kirby. Oh my god. This game is so incredibly fun, fun as in I felt child-like joy at experiencing and playing a NEW game. I played Yoshi later, which most people compare this to, but Yoshi isn't fun.
The controls are simple, tap Kirby to go fast / special move, and draw rainbow lines to steer him. Tap an enemy to stun. That's about it. And yet, the emergent gameplay that evolves is nothing short of amazing.
It's a platformer at heart, and usually they get old quick because it's all been done, but the control scheme completely changes the equation.
I initially thought the touch screen was gimmicky, this game proves that's not the case.