In case anyone is interested, I've made a Web-based random sim generator. It's not nearly as elaborate as those already available here, but at least it's a Web page so there's nothing to download. Refreshing the page re-randomizes the sim.
This does zodiac, aspiration, and turn-ons and turn-offs. It doesn't do anything regarding appearance or personality points. Also, it's not truly random, but it
is easier than rolling dice that bounce onto the floor where the dog can eat them.
Simple Random Sim Generator 
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