I really do love this film. I first caught in the early 90s on Cinemax and captured it on tape. This was one of the first dozen or so DVDs I ever bought. I think what draws me back are elements that grab me in any movie from the period.
First, being a sucker for 50's science fiction the idea at the center of the story is very interesting.
Second, the cast is top notch turning in performances better than the story deserves. The actors really sell this movie on every level and without the fine performances it wouldn't be half as good.
Third, although riddled with nonsensical pseudo science silliness the story is involving and effective.

As much as I enjoy THE 4D MAN the film does have one glaring flaw that irks me. It sports one of the most inappropriate scores of all time! On its own the film's music is not bad but the percussion heavy jazz riffs only fit the scene they're accompanying about 10% of the time. During the rest of the movie its like accidentally intercepting a radio broadcast at the drive-in. It's annoying and I'd love to have the power to re-score the picture.