I guess my favorite encounters were at Ft Chaffee, AR. We frequently used a live fire range that shared it's surface danger area with the Air Guard tactical range. Back then they flew A-10s and F16Cs and we'd watch them practice gunnery and bomb runs. I can tell you, the sound of those cannon would put a shiver down your spine. The falling brass was amazing, also...there's a bunch of it!
That said, I also love Stearmans. I got to inspect several (along with a really gorgeous P-51) at the Olympia, WA airshow a few years back. Fascinatingly simple, yet advanced compared to the biplanes I saw at Rhinebeck Field as a kid:
