First parts are most of the times the best, so the original one is THE BEST!!!

you got to be kiddin',SMB 3 it's the best mario ever!!

The New Super Mario Bros for the DS is the best for me. But I won't complain with the others because they're pretty great as well!

Never really played Super Mario Bros that much earlier, I was more into the combat and strategy games. My sister had an Nintendo though, and she played it ALOT :) Speakers on full, I can still here the "ding-ding" in my head ;)

I personally feel that the first version was the best. I have also used its all versions but didn't find them as interesting as the first one was. It was truly the best and my vote is with the first version.

I am also hooked with playing it before and I can say that the original is still the best though the graphics that they use is laid back compared to new games that are selling out today.