Animal testing: There's unfortunately no other way to reliably test the effects that drugs will have on the human body other than animal testing. It's not ideal, no, but it's a necessity, and they're just mice. Contributing to science is the biggest thing their tiny lives will ever amount to. Animal testing labs actually take really good care of the mice too, they take tons of precautions and make sure that the mice live out their lives in comfort when testing is done. I have zero qualms.
Uniforms: There are just too many ways for it to go wrong. Let people wear what they want to wear and they'll be happier.
Church tax exemption: I think it should be done on a case by case basis, so I guess put me down as on the fence. Things like megachurches where almost all of them have their leaders pocketing hundreds of thousands of dollars? Tax the stuff out of them, no remorse. Small town church that volunteers locally and barely gets enough donations to stay afloat? Leave em' alone.