Hmm. I don't think I've even seen 5 Jdramas yet...let alone 10. Haha.
For the ones I've seen:
1. Rich Man, Poor Woman (I absolutely love the cast! The storyline was a little too simple for my taste, but it was still enjoyable.)
2. Hana Yori Dango II (I enjoyed this part more than the first part because the storyline was better.)
3. Hanazakari no Kimitachi e (I love Shun's character!)
4. Gokusen (Because it's the only other Jdrama that I've seen alongside those posted above haha.)
I believe these are ALL the Jdramas I've seen thus far with the addition of HYD I, which isn't listed above.
And as you can tell...these are all Shun dramas. HAHA. Yeah, I love Shun Oguri!