I’ll stick with non-EU droids here…
Taking into consideration height, build, function, and appearance I will go with EG-6 “Gonk” Power Droid.
I won’t have to worry about it going into battle mode and shooting me. They’re slow and couldn’t run away very fast. Plus they are just the right height and the ashtray could fit on top with minimal slippage. Also it’s rarely used hidden front manipulator arm could massage my boys while the droid was busy polishing the pud…
Just for fun, if I was picking from EU droids it would have to be Guri for obvious reasons….
Apologies for the graphic nature of this post..I hope no-one got to sick to their stomach from the imagery.