Thanks to Eclectic Method
Eclectic Method are an audio-visual team who just went and did something awesome (or hugely sacrilegious depending on how you view certain classics). They added subtitles to the various beeps and whistles of R2-D2 from the Star Wars films. While it may sound like a one-off joke, they give him a bubbling personality and it almost makes you wish the whole films portrayed R2 like this video does.
Turns out R2-D2 may have been a bit more smart and snarky than any of us ever expected.