Thanks guys!
After Threepio, who was a incessant chatterbox and Vader who had classic movie lines, honestly I hit a bit of a snag with Boba since we all know that he's a man of few words. So I thought maybe I could do something different by incorporating Mandalorian glyphs and symbols instead.
Now Artoo was more complicated since he only beeps, woots and whistles. Then a lightbulb moment struck me: Instead of "beep", why not make Artoo current and make him TWEET?
And voila, glad you all liked the concept!