Agreed. all of them at least have PTSD after living with a battle after battle but their powers also can be a reason for their mental health poblems.
Scott can be obssesive with controlling his powers, Rogue has or had intimacy issues for a long time, Wolverine had amnesia, Storm is claustrophobic, Lorna has changes of humor that could be seen as a bipolar disorder because of her powers along with PTSD and Survivors guilt for surviving Genosha, Magneto has PTSD/Survivors guilt for WWII but also his powers mess his his mental balance when he uses them at their highter level.
I also agree you can built great stories around those issues