Here is the dilemma - I'm reapplying to med school this spring. It's important that I update my LOR to demonstrate my continued interest, etc etc. I work with a PI with big name and some decent pull at the med school here. He's an amazing person, and an amazing doctor, but he's also a bit mercurial. In my PI's ideal world, I would never leave my job. I would stay here forever and ever! I've only been here about six months, but I've done lots of good work that everybody is impressed with so the letter could potentially be very nice. When I took the job we agreed I wouldn't leave right away, but we never defined what that time period meant? Do I ask him for a letter of rec even though he'll probably be irritated that I'm applying? If I do ask for a letter, when do I ask for it? If I don't ask for a letter, when do I tell him I'm applying? Any thoughts/opinions/anecdotes/advice? Thanks!