i like big skis. they make everything look better and it takes more skill in my opinion to ride long skis. when i had short skis i felt like i was cheating somehow
that scale is 100% bullshit. ski length is related to heigh, weight, ability, agressiveness, what your skiing, personal preference etc, not just weight and not just height.
I fall into the 120-140lbs category and ski 179s and 190s.
im 135 and used 151s this year (I know way too small) but I could spin off of anything, I had no problem with them, I could whip them around however I wanted and they never washed out. I want to get karmas in the 160-170 range this year (I dont know the exact size off the top of my head)and I hope the change isnt too much.
the scale is made to help you figure out what ski length you want, obviously if you prefer a bigger ski and you weigh 120-140 lbs, you can ride whatever ski length you want