GI Service: I would highly recommend Dr. Prajnan Das on the GI service. Dr. Crane is great, but he's often traveling.
THORACIC: Dr. Cox is mostly at the Proton Center, but always attends conferences and tumor boards. I'm not sure Dr. Komaki works with medical students.
PROSTATE: Dr. Kuban is a sweetheart and a great teacher. So is Dr. Seungtaek Choi.
GYN: Dr. Eifel, definitely.
H&N: Dr. Ang is efficient and good to work with, but he doesn't see many patients (travels a lot; there's a "Where in the World is Dr. Ang Today?" poster in the clinic). He is nice to medical students and junior residents, but usually the senior residents end up on his service. I think it would be good to be on a team with some of the younger faculty members (Beadle, Gunn, Shah), who are excellent teachers and you'd get exposure during Chart Rounds. Rosie is well known, but I think you'd get more out of working with someone else.
LYMPHOMA: Drs. Dabaja and Reed are both great, teach a lot.
CNS: Drs. Chang and/or McAleer are wonderful teachers.