This was my favorite show as a child. I would run to the television upon the start of the theme song just to be able to sing 3-2-1 contact.
I was fascinated by the experiments and information they provided on the world. It made me want to be a scientist when I grew up...now am I a scientist? No, it seems I don't really like science that much but I do enjoy learning interesting tid-bits and how things work and this show had tons of that.
So if they ever bring it back on, I recommend watching a few of the episodes just for the fun of it.