What do you do when you hate a sim you've created?

I usually just go into manage households and take them off the rotation, be free!

If it's in a story I'm doing (in my head) the father, spellcaster who I did not like (no reason) had to die because the mom, second gen and spellcaster had a girl baby with strong bloodlines, third gen and powerful witch. I think that's the only sim I actually took out on purpose, not a good feeling. :/