SieberrCTF 7.0 Finals was my first finals in a CTF and it was held live, I found it much more enjoyable than NCO Finals as I could complete the challenge with my teammates and work on different challenges. Would go again next year if I qualify for it again. The crypto challenges at SCTF 7.0 Finals were very novel and different from the styles that I was used to, and I enjoyed them alot.
Hyperloglog
Nine Circles
CHSH Game
These are all the challenges that I manage to complete during the event, except for Nine Circles which was done by my friend but I would like to include that challenge here.