I wear my stuff till its crapped out and replace with easiest most sensible purchase. I never demo because it takes away from ski time.
I am like this too, it sometimes puts me in a bad spot. I had ripped my ski pants beyond the point of usefulness last season and waited until the day before my trip to Denver last Dec before I bought a new pair (at full price!)
Everytime there is a demo at my local hill i think "i should try some skis"
but then I realize they'll have to adjust bindings, etc. etc. etc. and I'm back on the lift to get in more runs. I like my skis well enough.