Hmmmm. I don't have CF, so my preferences are probably not interesting to anyone, but since you asked...
I, too, love french fries in icecream
Love sweet salty, like choclate and peanuts or pretzles
Love chocolate brownies or cake with tart lemonade
Lemon on anything with tomatos...like salad or pizza.
Lemon on salty things, too, like fries
As for my cf'er...well. lately she is into frozen things, especially tator tots and french fries. She will eat a TON of frozen fries, but once they are cooked, none.
She will eat almost anything as long as it's cold or frozen, actually. Nothing hot or warm, though. I actually plate her food 20 mintues before we eat so that it's cold for her. *Sigh* A liking for ketchup seems so much more normal... lol.