Ideally, I would tell you to follow your passion. InstedInstead, I suggest that you follow youyour passion while also looking at what you might do when you are done.
More realistically, I would applysubmit applications to applied fields that interest me. I give this advice for two reasons. First, academic jobs are hard to get. This will give you a good backup career outside of academia. Second, there is less competition because people have other career options outside of academicsacademia. Thus, all the graduategraduates from your program will not be competing for a limited number of positions.
For example, pick engineering over (pure) physics; statistics/data science/applied mathematics over pure math; fisheries science over biology; or clinical psychology over academic psychology.
Look at where the alumni from the programs you are looking at end up. They are the best predictors of your options when you graduate from a program.