In the film Voldemort seems sort of tacked on. You''ve got this metaphysical terror lurking at the edges of what is basically a spiffing school adventure. In the book he's more integral. I think it's got something to do with pacing and the way- in CGI movies- story gets bowed down under the weight of the special effects.
So I'm going to carry right on with The Chamber of Secrets. I'm warned I may start to feel Potter-fatigue in the course of this one, but that I need to keep going and the heaviness will lift.