Bulkhead, Breakdown and Bumblebee have 4 blunt fingers Ratchet, Wheeljack and Optimus all have 5 blunt fingers All of Wheeljacks fingers seem to be missing a joint, safe for his thumbs Arcee, Airachnid, Knockout and Starscream have 5 slim pointed fingers Airachnid and Starscream both have very long digits, while Knockouts is each missing one joint.
Skyquake/Dreadwing and Megatron have 5 pointed fingers, and Megatron is also missing one joint on each finger.
Soundwave has very unique hands. He has 4 long thin fingers, with the tip of his wing sometime acting as a 5th finger for support. They are all missing a joint, and he seems to be able to move them sideways. He doesn’t have a palm or a wrist.
The vehicons/eradicons have only 3 fingers, all three of them missing one joint as well.
* Most autobots have blunt fingers while most decepticons have pointed fingers. Breakdown and Arcee seem to be the only ones so far to be an exception to that rule, and Arcee tends to be more ruthless than most autobots, while Breakdown was, well … Breakdown.
* Bulkhead, Breakdown and Bumblebee are all fighters, while Ratchet is a medic, Optimus used to be an archivist and Wheeljack is a scientist in most of his incarnations. The first group has 4, while the second group has 5 fingers, and I wonder if that is somehow related to their professions.
* Now, allow me a moment to giggle at the fact that Starscream and Knockout share their hand type with femmes.
How's it hummin'? 