Well, I like yourself tend to treat my arrows like bullets. They dont often make it back for a reuse! lol.
I have killed giant rocks. Last year I got one that never took a step...dropped it right there, and my arrow or what was left of it, about 4", did an amazing job of exploding on impact.
Archery for me has been a never ending flow of arrows. I usually take a full dozen with me to camp. Some for plinking at the target with, and the best tuned ones for hunting.
Six broadheads is usually been enough per outing, however, I did last year end up buying more before the season was up. LOL.
I shot competition meets since I was six years old, and only recently started hunting. I swear I have never shook so hard when shooting as you do when bow hunting something. Its amazing how much of a rush it is, and how distracting it can be to your perfect form. I am getting better under pressure little at a time, but for now, I always take more than I think i need.