woot another Jdrama lover:33
I recommend Nobuta Wo Produce, it's one of the most popular Jdramas ever and it's pretty good! not to mention it features the two hottest guys in Japan imo, Kame and Yamapi hehe :3
Speaking of Yamapi, Kurosagi was also pretty good even though I found Horikita Maki's character so dang annoying.
And speaking of Maki, Atashinchi no danshi was pretty fun too.
Yankee-kun to Megane-chan also had some hilarious moments but also some others that really bored me.
And, finally, Hana Yori Dango is also a safe watch, everyone likes this one at least to some extent, even though the Korean version is arguably better. I do know some people who prefer the J version though.
So there you go. If I had to recommend just one I'd probably go with Nobuta, but all the other ones I've mentioned are also worth watches :)