I have played virtually every version of Tetris out there and I've found that the original Gameboy version is the best. The play control, the music, the polish, everything is perfect. While even Nintendo themselves tried to improve upon it with tetris for the NES, Tetris DX for the GBC, and even Tetris DS for the NDS, the original is still best.
I love it so much, I still have the original Tetris pack-in cart that came with my DMG Gameboy in 1990. I still play it. Heck, that cart is probably older than some people who might read this. I also keep the VC version of it on my 3DS.
In any event, what are your thoughts on the original Gameboy Tetris? Is it the best? Rubbish? Somewhere in between?