I think that with Korean Drama it's all about timing. If it is your first one, then it will always be dear to your heart. Therefore I can understand why this drama is so loved and one of the most popular korean dramas. However, watching it ten years later, I do fail to see what other saw. The story is okay, too close to a manga story but with the korean notes all over it. However, everything that kept happening were ridiculous. I can't even imagine what the production of it costed, as they went to countless trips, even had a horse race, a car race, sports cars and castles for houses. But it wasn't the riches that spoiled the plot. The amount of cliche twists was unbelievable and I was left wondering if they really used that trop, as most of the events happening were idiotic. Though, there were some parts of the story that I liked. I especially enjoyed the side pair story, as they were cute, and also the start of the drama was really strong.
Now, for the characters; most of them were okay, although the leading lady got a bit annoying eventually with all the screaming and falling while walking. But, the highlight of all was her family. They were basically potrait like caricatures, always pushing the girl to do things she didn't want just to obtain money. The F4 were adorable, so I can't really say much about them (though at first they were really dislikable).
Overall, a lengthy drama, with ridiculous plot, some annoying characters and a good cast : 4 out of 10.