There have been histories of the movies written in terms of genres and filmmakers. Perhaps one needs to be written in terms of erotics, the moments that break movies down in our minds into images of faces, bits of movement, a snatch of music on the soundtrack. Those moments seem to reveal other, more delicate, movies inside the one we're watching, as if we were in the midst of reading a novel and a symbolist poem had floated up between the lines. Maybe it's the way he seems to be led forward by his shoulders as he walks, or the way he has of looking from side to side as he strides forward, scanning the scene he's already trudged into. If the film's protagonist, Neo, is a role that Reeves seems born to play, it's because it's the one that allows us to revel in his physicality, which has always been such a strong component of his acting.
Movement is accepted as part of the performance of a dancer or a comic.
And certainly talking about the physicality of, say, Olivier as Henry V, or Kenneth Branagh as Hamlet, wouldn't surprise anyone. I don't think that the way Keanu Reeves looks or the way he moves is all there is to appreciate about the guy. But I often get the feeling that admitting to enjoying his physicality means that I'm failing my critic's responsibility of treating cinema as a serious art form, that having a sensual or kinetic response means abandoning intellect, that I'm forgetting to maintain that even failed or boring or pretentious art is more worthy of serious consideration than successful entertainment. No doubt there are people who just don't dig Keanu Reeves. Subjected to more ridicule than perhaps any other movie star, Reeves is attacked with the enthusiasm people reserve for someone who truly drives them crazy.