Why I should be a movie critic

I watch so many movies. With that said, when watching these movies, I generally watch them (or at least the ones I really like) over and over. I watch them so many times that I can usually find at least one mistake within. I enjoy scrutinizing movies and it makes me have a sense of accomplishment somehow. How does one become a movie critic? I have read so many critiques that were completely different. I mean what is a critique anyway? It's merely an opinion made by different people, right? I would enjoy the job of being a movie critic. If anyone is reading this, please feel free to share your opinions.