This was actually excellent timing as well; I've been on a HP binge - I've been rereading the books for a while now and am actually rereading Goblet of Fire right now! I so love rereading the books - I crave reading them just like I'm reading a new story - it cracks me up every time.
Anyway... the comparison:


see Ron's jealously rear its ugly head for the first time - with both Harry and Hermione. I liked the strength of Harry and Hermione's friendship here as well. I loved Ron's jealous spat over Krum - hilarious. The Yule Ball is one of my favorite events in the books. And, as always, the humor is there in spades. I freakin' love the Weasleys - they're all so funny in their own ways! (Now there are two new characters I wish we'd seen more of - Bill and Charlie!) Of course, the other part of the book that really makes an impact is the end. I mean Voldemort comes back - that's like the switch is flipped. We go from being a kid story to a young adult story right then. Now we don't have a weak version of the bad guy - the actual evil villain is a going to be a big part of the story.
The Movie: To be honest, one of the things I thought while I was reading the book was the fact that it would make a really good movie. While I didn't like the structured tournament for the book, I knew it would work really well for a movie. And there were some great parts of the movie - the Yule Ball was beautiful, the tasks were pretty cool, and the ending with Voldemort was spot on and scary as all get out. I loved all the Moody lines (mostly because they were straight from the book). And honestly, I didn't feel like the left too much out (S.P.E.W needs to be mentioned here however - because it wasn't mentioned in the 4th movie, it totally ruined my favorite Ron and Hermione moment in Deathly Hallows: Part 2). And... well, it must be said David Tennat is in Goblet of Fire - just saying. He's not in the movie for all that long, but he is there and he is, of course, awesome!

In Conclusion: Obviously Goblet of Fire isn't my favorite of the books or movies, but I still remember my anticipation for them both - I was excited for them and even now, I can't wait to go back and read through the third task and Hermione catching Rita Skeeter. I also think that Goblet of Fire was one of the most commercial movies for the series - I mean the tournament is something people can understand. Incorporating the other schools allows from some new fun ideas and the ball is of course something that people will be drawn to. It is also that turning point in the series, so people will be in the know for the next movies/books. It makes sense for people to like this movie - it works on a lot of different levels.
DFTBA!
Jana