I was so excited one day when I found pants that zip all the way up and down both legs. That's my favourite! Because it's silly!
Front...although I had a pair or two that zipped in the back. Was a bit odd.
The front because people can unzip your pants from in the back and it seems odd for your pants to zip on the side to me.
Ziippity doo da, zippity yay
Zip up your doo da and put it away
Naw. I really don't like pants.
elastic waist - on the rare occasion when i wear pants . . .
Back, when I wear pants. I prefer skirts and dresses -- ones that zip in back.