Toxoplasma gondii is a bit overrated in my opinion. Unless your immune system is compromised or you're pregnant, there's no scientific proof that there's immediate danger from it. And if your immune system is weak or you're pregnant, you have a good excuse to make someone else clean the cat litter ;-)

Also my behavior is influenced by a lot of things outside my control: Genes, hormones, antidepressants[1]... what do I care if a parasite adds to the mix?

[1] While I can control my intake, I can't control the side-effects.