I've never once thought any of my Amiga's are female. Computers are all male to me. Cars can be female, mine is called Belinda. Perhaps the A600 could be considered female though being as though Commodore called it 'June Bug'.
I wonder if female Amiga users (if there are any) consider them to be female, whereas male users consider them to be male. I'm thinking this could apply to all computers and not just Amiga's.