If you wanna see a GREAT example of how to do bots, check out WEG's supplement on Droids for the D6 Star Wars game.
It's excellent.
It's got neat little additions that you can add to droids, but droids begin as characters--with standard characteristics.
Then, you add equipment and attachments, like a rotary saw or universal comp plug-in, voice box, etc.
It's good stuff.
FFG's Star Wars line does the same kind of thing. Droids as PC's are built as PC's; lower racial attributes (1's across the board) but lots more points (not enough to make up for the lowered attributes, but enough to buy one up to 5 easily...). And all your gear has the option of being built-in..