I know this is kind of tin foil hat club stuff, but the research is backing it up now. For all you young guys with 30+ years left flying, think about how the company wants to fly us to the max extent possible and mirror FAR 117 rules. It will be like having a chest X-ray every time you come to work.
I found the article in another thread and thought it was an interesting read.

http://www.sciencealert.com/newly-discovered-radiation-clouds-could-pose-extra-risks-to-frequent-flyers