I picked sidecut because my last two purchases were made looking for a particular turn radius (sl and gs), but really it's a combination of flex and sidecut. If I'm looking for a ski to rip on I want one that's not a noodle. If I were looking for a powder or bump ski I would want a softer flex. I also want to match the turn radius to the turns I plan to make. Ripping high-speed large-radius turns on a sl sidecut isn't a good idea. Sidecut and flex together along with damping properties pretty much define the ski.