I hated it that they blew up the Enterprise. One of my beefs with all the movies is that the Enterprise was never really grand it always ended up getting pumeled or destroyed.
Uh...it got destroyed for a very good reason in Trek III though -- because Kirk was trying to save his f'n life. One of my favorite scenes of all Trek when the Klingons walk on to the bridge and find the computer counting down to 0. And Kirk is obviously upset at having to have destroyed it. Very dramatic.