Counselor Troi. I find Keiko to be just a little flat as a charachter.
Would you rather be examined by the EMH or Dr. Phlox?
The EMH. Phlox might decide I'm naturally destined to die if I have an illness... or just discuss my medical records with anyone who asks. To say nothing of who is better.
Would you rather be punched by Sisko or Kirk?