Interesting point. My husband works in a casual office and rarely has to wear suits. So he's comfortable getting a Sport and always was. I think he never cared all that much and was just going to copy whatever I decided anyway, to be honest. He's only getting one to keep me company, it seems.
Sister-in-law loves the sporty look and lifestyle and fell in love with the Sport model immediately and never gave the others a second look. I work outdoors. I'm not the world's biggest fan of plastic/rubber bands but it was clearly always going to be part of my choice eventually. At least the reviews speak well of it.
Enjoy your new watch when it arrives!
****My main qualm about the Sport was never about the aluminum, really...because I am excited about the lightness and matte finish.
I liked the idea of the zirconium ceramic backing on the SS and I loved the look of the enameled dot on the crown (which some people hate, but I love enameled costume jewelry). If I have a last minute change of heart back to the heavier SS, it will be over something as stupid as that.