TGM3 is the greatest single-player incarnation of Tetris.
If you can find Texmaster, it's a PC clone.
After playing TGM3 it's really hard to play other versions of Tetris. Very difficult to get used to rotation rules and the hard drop.
I used to play Tetris GB for days, now, for some reason, the field feels so... small. Also the piece system is a jerk, they can literally give you non-stop S/Z...