First things first, I am not the best skier, nor am I the toughest. However-- after buying a pair of boots last year-- I had found myself stranded on the slopes, curled up into the fetal position clutching my feet in pain.
Now, obviously that little description is a bit vague, but it basically represents my ski season last year, which ended in my selling the boots and reverting back into rentals for the year. The boots themselves were a pair of nordica hot-rod 8.5's. I got them at a local store, and, along with causing arch pain, were a bit too flexible and soft for me.
As for myself, I'm 6' 2", 250 lbs, and I ski at a decent pace. I mainly ski blacks, and would call myself an advanced skier. I usually ski on the east coast, but I sometimes am lucky enough to go out west, mostly to Jackson Hole and Alta. My feet are size 13's, and with-wise they are roughly E's. I have slightly low arches, and am a bit of a pronator. I'm also a bit bowlegged, and have fairly large calves.
Now, going back to what I said in the beginning, I ended up in rentals at the recommendation of a bootfitter up in Jackson Hole. The old boots had given me a ton of arch pain, that often forced me to have to take off my boots every other run. He basically said that it wasn't worth trying to pack out my boots any more, and then threw me into a pair of Atomic LF 90's, which were much better, although they could've been a bit stiffer. As for why it wasn't worth fitting more, I would guess it was because they had already been backed out and fitted, though, according to the guy, the shell itself was too narrow for me.
So now that I'm looking forward to a new season, I'm in the market for a new pair of ski boots, which I hope will be a bit better on my arches.