I am in software engineering, so cannot speak for Aerospace in general, but common principles should apply. Most engineers enjoy the job, because often times they don't know what they have to work on and that is what makes it exciting. There is so much innovation and change happening that the best way to approach an engineering career is if you are excited about the change. I would advise you to look into what areas of aerospace engineering you are interested in and go from there with the potential areas being manufacturing, analysis and design, research and development. Just remember that space travel is going to become common too and that will lead to new areas in aerospace engineering.