Me! I started watching about a year ago and then buying boxsets of my favorite ones. You've seen most of what I've seen, tho.
Nodame Cantabile - http://wiki.d-addicts.com/Nodame_Cantabile
excellent! A little over the top, especially when Milk-whatisname shows up, but if you give it until the second or third episode you'll be fine with the humor.
The Gokusen (1) - http://wiki.d-addicts.com/Gokusen
probably my favorite series. Its about a young teacher that gets assigned to the delinquent class (shades of Great Teacher Onizuka) but the rub is she's secretly the granddaughter of a yakuza head. Very funny, well acted, and touching in ways as she tries to win the boys over, hide her yakuza ties, and give overly dramatic speeches followed by beatdowns of outside troublemakers.
It spawned two more seasons, but while the classes had hotter and hotter guys in it, none have had the enjoyment of the original. I couldn't even finish Gokusen 3.
Lovely Complex - a movie about a tall girl and a short guy. The anime was much, much better, but its still good for a view.
Yankee-kun to Megane-chan - http://wiki.d-addicts.com/Yankee-kun_to_Megane-chan
another show about a girl ex-delinquint now turned class rep who takes a delinquint classmate under her wing, no matter how hard he resists.
Hana Kimi (Hanazakari no Kimitachi e) - http://wiki.d-addicts.com/Hanazakari_no_Kimitachi_e
girl dresses like a boy in order to attend an all-boys high school. A little angsty, but the guy playing Nakatsu makes up for it with hiliarity! Homo ja nai!
Hana Yori Dango - http://wiki.d-addicts.com/Hana_Yori_Dango
(spoilers in link! don't read past the synopsis if you're interested in watching!)
my second fave dorama. A poor girl who attends a high school for the super rich ends up inadvertantly becoming the target of the four most elite boys (calling themselves F4) who have the run of the school, who then sick the rest of the school on her to make her life miserable. Of course, nobody has ever decided to stand up to them, but Tsukushi is a 'strong weed' after all.
Salad Days (Doremisora) - http://wiki.d-addicts.com/Doremisora
I've only been able to track down the first four episodes, but its another 'teacher given the class of outcasts' show.
Others that were good:
Great Teacher Onizuka
Buzzer Beat
Nobuta wo Produce
Honey and Clover
Hotaru no Hikari
Its not out yet, but I'm very looking forward to the live action version of Beck.![]()
The GTO movie is seriously one of the funniest movies I've ever seen, Asian or otherwise.