The most exciting thing : being on a bad cycled-team with about 3 kids out of 20 who aren't rookies, on your rookie team, making it to rank 8, feeling proud as hell in the most awesome competition in the world. It's the knowing that you won't win the regional this time, but still making the best out of the best of times.
The most annoying thing: having your autonomous mode not working due to some unknown network problem, which could've been solved very easily... And figuring out the solution a week after that regional...