Our trouble with F! is that we once saw it on a raw, windy rainy night. The show was almost cancelled and should have been that night. Once it started the storm kicked up again! IT was so windy the palm trees were blowing sideways! So all the water from the show was blowing on the audience and we got soaked. It was probably in March, so not that warm of a night.
I still associate F! with being cold, wet, and wind-blown. the children in our family have never been too scared to see it though. We've taken all ages to see it.
Others go to HS just to see F!, but we often skip it because if we are in HS that late, the lines for all the other attractions get shorter as F! time draws near. We see it about every 3rd visit or so.