I can answer for EDUAD - R2D2 for Artoo, and EDUAD is as it says, can apply to BG or just Life itself I expect - ie Mike is NORMAL ...... and his blog is a chronicle of his everyday life.
Well I do refer to it as El Pumpo in writing sometimes sometimes Mike, but would not say that to anyone who wasn't one of the cognescenti ie my Forum pals, I've never said it to eg my DSN - and my GP is so bloody straight laced I'd never try jesting with him. (And that one came from 'Soap' somewhat after the character 'El Puerco', which doesn't actually mean 'The Pig' anyway ROFL) (I was in the Cast List of 'Soap' under the name I had at that time - I played Eunice Tate) (Incidentally, saw Billy Crystal recently on Graham Norton - he's got quite cuddly, hasn't he!)