I had a fairly lengthy post in PRES, so let me acknowledge now all of the really cool things I've seen this year!
1. Stoga Optics - Although there were a couple of issues with time allotment for teams (which I don't think was the supervisors' faults), the proctors were extremely nice about handling the issues that arose, and the test (although perhaps not the most creative) was very challenging, which was much appreciated since I didn't have much experience at the time.
2. Tiger Optics - Run by the same people as at Stoga, but with the time allotment issues fixed this time! Also had a laser shoot that I was able to score a 49-ish on which is always fun.
3. Tiger MatSci - Simple yet quite functional lab, interesting questions that covered both theory and application, and knowledgable supervisors. Need I say more?
4. Tiger / Regionals Astronomy - I'll use this to pay a compliment to the PA state supervisor for Astronomy, who always creates (terrifyingly hard yet) awesome tests that really stretch how much you know. Is there some Wikipedia stuff? Yes, of course, but there's also plenty of inferential stuff, and although I typically leave the math to my partner looking back at it now these tests both had a good mix of mathematical concepts. A round of applause for this gentleman for both terrifying and fascinating me.
5. Regionals Optics - Was the test short/hard enough that several teams (mine included) finished early? Yes. Was the Laser Shoot run much better than I had seen before that made accidentally knocking the barriers when removing the coverings and strange inclines in the box less likely, also featuring a laser that wasn't just a straight up laser pointer so that there was no risk of that moving? Also yes. I really appreciated not having to worry about a ton of small variables potentially messing up the LS (and it might help that I scored very well on it