Trajactile, Boxlife, Digidrive, Mighty Flip Champs are my votes.
Trajactile is like puzzle bobble but with limited missiles, and specific bricks to shoot.
Boxlife is great if you find catharsis in organizing things just so, great for OCD.
Digidrive is a solid puzzle game with neat mechanics, but with a strong element of chance. Sort of like all the art style games.
Mighty Flip Champs is just a well made puzzle game. Some trial and error involved, and sometimes you don't even realize how you solved it, but full of those great "AH HA" moments. PLUS it has a STELLAR soundtrack, and nice character design.