If you could walk into your local hobby shop and buy an empty robot shell to build and customize who would you bring home, R2, B9 (Lost in Space), K9 (Dr. WHO) etc?
Man after my own heart. Of course even though I'm building a K9, it's my second choice (only because the first is unrealistic...)
Haha I completely second that, I've even gave it (building Bender) some thought and then I let it go after a few seconds... those arms & legs :P
...but regarding nostalgia...