I'm a total fanboy for Tetsua Mizuguchi
Currently I'm obsessed with Lumines on Xbox 360. I'm not usually a big puzzle game fan but the music and visual design is so beautiful I can't stop playing. All the bonus packs get a bit expensive on XBLA, but art this good in a game is worth it.
I'm excited about the next game his company Q Entertainment is doing; Every Extend Extra Extreme. It's an Xbox 360 adaption of a great freeware game concept.