First Impressions Despite the unusual photographic effects created in these captures, I found the images and triptych of them, uninteresting and quite a 'personal study'. I gave this a 3 during voting.
I also had no idea what the sign language was and did not stop to consider it during voting as the main subject was not my personal viewing preference, so I moved on fairly swiftly.
Photograph Information, Technicals & Composition Review An aperture of 2 explains the good and unusual effect produced, however, it also created a rather dark and 'odd' effect coupled with the lighting and 'shirtless' subject.
The composition itself within each photograph and then placed within a triptych would have been better if the torso was aligned in each image.
Comments, Score & Placement Review 85/145 and a score of 5.56 is not bad, considering the subject matter, which may not have engaged many viewers. An average of 6.88 from your commenters reflects their comments and that most knew the sign language being displayed or knew the intent and either way, liked how you captured it. This just reflects how people view photographs and subject matter differently - just because it isn't something that appeals to me, doesn't mean it won't appeal to others.
Summary If doing the signs for DPC was your main focus then more attention to distractions that would take attention away from the hands/signs - such as if there is person in the background, whether they are in focus or not, whether they are clothed or not, if so what clothing, the lighting, etc - would have allowed your message to come across much more clearly.
PS
I see this is your first DPChallenge submission - welcome to the 'fun' of entering & voting in Challenges.
Congratulations on taking the plunge, this is a good score and a decent quality photograph for your first submission.
Nice even lighting and composition. Not sure what the hand positions mean, so I'm left with three pictures of hand positions and not much meaning. Overall the feeling is dark and distant (the background face, looking like it is holding back intentionally).