Spark plug questions

1st let me say this is just my opinion, but Autolite Plugs are cheap junk. I have learned this over the years with having cars come in running like crap only to learn the owner tried to tune up using the things.
I've seen many a mopar puke the wrong plugs, put a good set of Champions in and your good to go.
I've come to learn, Champions and some NGK's in Mopars, Motorcraft in Fords and AC's in GM's. Bosh plugs go into Euro trash and there is a plethora of stuff if jap cars. I also know the company that owns NGK also owns Champion.
but the one thing that seems to be common among most all makes, Autolite plugs just don't get the job done.