First off, I for the life of me couldn't remember the previous movie which left me a bit confused (I don't read the books).
The movie had some funn parts, which was great! I really don't remember too many funny moments in the previous Harry Potter movies. Ron Weasly definitely stood out in this film.
Overall, I felt Half Blood Prince was the least interesting and exciting of all the Harry Potter films thus far. It ended abrubtly and left you feeling like something was missing.