The Star Wars droids seem to emote more personality than some of the life forms. Especially the ones with major roles like CP3O, R2D2, K2 (from Rogue One) and L3 from (Han Solo). They have an intelligence along with a child like quality of being constantly surprised by humans. Although I have to wonder each time CP3O says “Thank the Maker” as if you look to Episode 1 he was actually made by Darth Vader (granted before he became bad).