From Mass Effect 2
[Dr. Chakwas shares a bottle of Serrice Ice Brandy with Commander Shepard and they both get drunk
] I thought Alenko's biotic display might've broken Jenkins' back, but Jenkins pops up and yells, "THAT WAS AWESOME!" Ah, Jenkins. Soldiers like him make the Alliance great! Cerberus lacks the same... enthusiasm.
With your service record, you could've gotten a tour of duty on any Alliance ship. Why'd you really leave?
Maybe it's less about leaving and more about staying. As a military doctor, I mostly treat people who are in bad shape. Often they die. And if I *can* help them, they move on. Either way, they leave.