If a gay quiz says I am gay should I?

If you walk into a room and check out the guys before the girls, or don't notice that there are girls, then you're gay. Surely you can figure that out by yourself without a quiz.

If a quiz says I'm a western pizza with ranch and BBQ sauce, shredded chicken and bacon, mozzarella cheese and a delicious garlicky crust does that mean that's what I have to be?

Should you what? Jump for joy, put a paper bag over your head, jump out the basement window, run out and find a boyfriend,or all of the above

There's quizzes that say you're a potato, so I would mostly disregard them - unless you WANT to be a potato of course.

Yes.

Those quizzes are highly reliable and almost always accurately predict gayness.

Taking the advice of an online quiz isn't a could approach.