I gotta say I'm surprised at all the negative opinions of Takei/Sulu.
There's no doubt Shatner was the star, and went on to basically be omnipresent late in his career.
I don't have strong feelings about the Sulu's role or the stories that always fly around (Takei told a couple good ones at the San Francisco convention). I have no axe to grind as far as the movies, or the supposed Sulu captaincy/TV show...
I can say that, having met both men multpile times, George Takei is by far the more gracious and genuine person. My wife and I spent a decent amount of time with him and Brad at the convention, and they were just really kind, funny, interesting people.