Depends on what you mean by hills. A fair amount of folks on this forum seem to think that a quarter-mile length grade at 5% is a monster grind. I am located in what is by no means a particularly mountainous terrain, and what is considered a respectable hill starts at 3 miles at 8% and only gets steeper and/or longer. Burliest climb I can think of is Sierra Rd (see ToC stage 4) or Welch Rd (even steeper than Sierra), and I won't even bother attempting them.

I tend to like higher cadences, but what I think of as a high cadence for me is low for someone else. Even though my lowest gear is 30-32, multi-mile climbs see me in the high 60's to low 70's. If it's something ridiculous like a half mile at 12% or greater, I am doing about 30 by the time I reach the top I am so depleted, but thats just because I have several physical disadvantages, some of which I cannot change. Flats I tend to try for low 80's.