I know there are about 50 different versions of tetris. I love most of them. Some are a tad more difficult than others.
Today I'll specifically reference two newer versions; Tetris Party on the Wii, and Tetris Ultimate in the 3DS.
A while back I played Tetris Party for almost 2 hours straight, scoring in the ballpark of 2 million points. I like this version of the game because it has a beginner mode that is only 3 peices. It is so much fun. You can also play solo or against friends. Battle mode against my husband is often fun and fierce!