None of the motion picture directors were familiar with it, Baird is the only one who just approached it like a typical movie instead of a part of a larger canvas.
Nimoy, Shatner, Carson, and Frakes certainly were familiar with it. Or maybe you meant the directors who came from films and not TV.
Yes, obviously. Robert Wise wasn't familiar with
Trek, but IIRC, his wife and daughter were both fans and were the ones who told him that he really needed to get Leonard Nimoy in the film. And while TMP missed the mark in a lot of ways, it does have more of an epic feel than any of the other
Trek films and looks more like a big budget feature than any of the others..
Nicholas Meyer and Harve Bennett weren't fans, but they both did their homework and gleaned the essential qualities to bring to their films.
JJ Abrams was a
Star Wars fan who brought more of that sensibility to
Star Trek, and honestly in retrospect it's hard not to see his
Trek films as just sizzle reels for the job he really wanted.
Stuart Baird just saw NEM as a stepping stone towards a directing career after decades of editing films. I don't think he particularly cared if it was
Trek or some generic action film like
Speed.
I don't think I've ever heard one way or another about whether or not Justin Lin was a
Trek fan.