I don't blame anyone for putting Kung Fu Panda on their list, but I haven't yet seen the sequel.
There was one I watched on TV one night and I don't remember the name but it was a movie with seven ninjas with their own color theme and fighting style, and one by one they got taken down by different style ninjas. I think at one point one dude had his guts getting pulled out but the special effects were cheap and it looked like rope with a bit of red ink on it, and for some reason it made the movie even cooler. I hope I can some day come across it again.
The Street Fighter (Sonny Chiba) also impressed me as a little kid.
Same with Enter the Dragon.
Then Jackie Chan came out with Rumble in the Bronx and I went apeshit for kung fu movies once again in my life. I bought a giant collection of VHS movies he'd starred in. Fearless Hyena was one of my favorites because of his final fighting style. Supercop, Operation Condor; as long as he isn't co-starring with an american actor in the movie you're probably going to see something awesome.
I'll try to do the rest of the list by the actors but I won't list the actors!:
Ip Man 1 & 2, Iron Monkey
Ong Bak 1-3, Thom Young Goon (The Protector)
Kung Fu Hustle, King of Beggars
Fearless, Hero, hell even Unleashed
Anything Bruce Lee. Buy yourself the Special Edition Enter the Dragon and watch the bonus DVD with all the Game of Death footage. You're doing yourself a favor because after society collapses these will become the new currency.
True Legend
Bodyguards and Assassins
I love Kung Fu, Wushu, wuxia, Eastern, whatever style or genre you'd prefer to call it. And I love you all for loving it as well.
Hopefully one day I will come to your school, and we will finally see who has the best!
Snake and Tiger-Crane, Dragon-Monkey Stance
Iron Vest, Stone Hands, Shaolin Razor-Dance
Challengers step up, sign your waiver, take a chance
Grasshopper:
meet the sun, The One, whose style is too advanced.