anyhow, its all about the winter... every winter is different. 2 years ago there was record snowfall almost everywhere in the western US (give or take). record december/january in tahoe, 700+" at alta/bird, records all over colorado, etc etc etc. 120mm legitimately was my daily driver 2 years ago, because i skied untracked snow 50+ days that season, and only skied a 99 waist ski ~10 days.
of course the last two seasons make me want to add an 85 to my current 105 daily driver. i have used my 120mm skis about 10 days each year the last 2 seasons. but its not because that ski is not awesome, its just that the snow isn't there at the moment.
however, all this underscores is that a 3 ski quiver on the west coast (for me: 85, 105, 120) hits all needs perfectly,and you can go ski in any condition, anywhere, no matter what the season is doing, and be really happy and have an awesome time.