Hmm... how to explain why I like Howl's Moving Castle...
Well what I liked the most was the story it told, it was really nice, I'm not sure I could tell you the plot without giving it away though. :P
It had very funny characters, I got some great quotes to put it Favourite Quotes Section on the side bar.
Another thing I really liked about the movie was how it was both funny and sad, and how the bad guys end up not being so bad after all. It's a really nice movie, but to really appreciate it you have to see it. Also I liked how it was drawn, how the characters looked and that sort of stuff. I really enjoy the japanese style cartoons, manga and anime.
If I think of any other ways to explain what was good about the movie I'll post them.