The HP movies are actually pretty bad. Or at least the cast (particularly Emma Watson) can't act. Alan Rickman in the last two movies was a caricature of Snape and I really, REALLY hope that's not the case in HBP. Rupert Grint is probably the best out of the Trio, and the saddest bit is, I don't even like Ron. The movies made me warm up to Ginny and now I can actually get incredibly annoyed with Hermione.
Comparitively, the Narnia films kick so much ass, because the four kids were better at acting from the first movie itself. And in the Prince Caspian movie, Ben Barnes was the weakest link. The four kids had bonded over their experiences in the first movie and it showed in their acting onscreen. It also heped that Edmund happened to be extremely shiny. Skandar's acting has improved insanely - or at least his role in the second film fit like a glove. Georgie Henley (Lucy) might have grown super fast, but that just makes me more excited about Voyage of the Dawn Treader.
Oh yeah, and in the first Narnia movie? PETER WAS SO YOUNG. He looked like pure jailbait. Edmund's voice was squeaky - Skandar's voice hadn't broken yet. And umm, I remember watching movie #2's ending, seeing Susan in that white dress and going I CAN HAS BOOBS? Oye they've grown a lot - uh, the kids that is.
Now, if we were to look at The Golden Compass, the movie had a fab cast that could ACT but the script was just lackluster. The HP movies in that sense were more entertaining perhaps. Still, I could easily watch TGC multiple times while trying to watch HP would probably be suicidal. I couldn't even play it in the background. Emma Watson manages to go into hysterics every other scene *facepalm* It kinda makes me wish the casting people for Narnia had had a hand in the HP movies *sigh*
Oh and come to think of it, there's an Artemis Fowl movie coming out in the distant future, right? God, that makes me nervous.