There are so few sequels that do work, and have something a bit more to say from the original. Fright Night 2 is one of those. It has more to say on the idea of the supernatural in real-life (Charlie's inability to deal with the events of the original movie, Vincent's trying to avoid the whole thing), and gives us a decent follow-up to the original with Dandridge's sister on a revenge kick. There are more nods to Stoker and the original vampire mythology (the reference to wild roses, for instance), and the new vampire's sidekickers are equally as weird as Jonathan Stark's Billy Cole in the original. See it if you can: it doesn't seem to be a movie that shows up very often.
Review of Fright Night Part 2
