haha my best friend put the last picture on my fb, i wondered were she had found it and here it is ! anyway, i totally agree with what you said, and my first drama is hana yori dango as well, that's a good one to start with !
my best friend always told me the plot of the drama she was watching (the first one was yoy're beautiful, it took her hours to tell me the story, and I knew how I wanted it to end without seeing even a picture ^^) and it sounded cool so I started watching too, that's how she converted me !
heartstrings and secret garden are in my top 5 best ost, and you're beautiful's songs are great too ! have you listened to King 2 Hearts' songs ? they're just amazing !
Anyway I don't know the others, but Merry Christmas !