In a previous game I was playing the Yor and just for fun I decided that I simply wouldn't bother to research the Universal Translator technologies. This almost instantly placed my on a war footing with the entire galaxy, but I really felt like I was controlling a race of machines, shunned by the rest of the universe as evil killers.
By being forced to remain on a war footing my ships became highly trained veterans, my technology research was based around repelling all borders and keeping the other races out. This required massive research centres and production facilities to keep us up there... I finally made satisfying a conquest victory then suddenly I realised how much fun I I had been having all because of a crazy choice at the start of the game!
Who else sometimes subscribes to such madness??