Glory
"Stem cells save lives."
Once you start looking for it, you'll see that slogan everywhere. But do they really? If they do, and your work is in researching stem cells, then that's a lot of glory right there. If they don't, but your life's work is to research them anyway, that's less glorious.
The answer is complicated, and depends on both your point of view and how research will develop in the future. There are four kinds of stem cells: adult tissue cells (that eventually turn into muscle, heart, neural, blood, or kidney cells, among others); embryonic cells; umbilical cord cells; and induced pluripotent stem cells.
Currently, stem cell therapy is pretty much constrained to the adult tissue cells. For some people, stem cell therapy—especially bone marrow transplants, which have been around for decades—has worked wonders (source). That means more buckets of glory for you. For others (ahem, on-a-budget stem cell therapy in Mexico), it isn't so hot (source).
But maybe you want to work with embryonic cells. Better set Beethoven's Fifth as your ringtone, because you're going to be getting some angry phone calls. According to some folks, who define life at conception and therefore consider embryonic cells (which means an egg was fertilized) a form of life, you're a murderer.
But according to others, embryonic stem cells repurpose test-baby embryos that would otherwise be destroyed in order to save the lives of people currently suffering from Crohn's disease or pancreatic cancer.
Alright. There you have it. It's up to you to decide.