I agree completely with the above advice, and I would add: just keep quiet about your plans to switch to anesthesia. You may like general surgery after all, so you don't want to burn any bridges there. In any case, you need to do the internship year regardless. However, in my day it was quite common for surgery residents to burn out and switch to anesthesia, and spots open up all the time. So after a few months or so, if you still want to switch to anesthesia, you might approach the anesthesia residency director and discuss it with him/her. In the mean time, as an intern, be nice to the anesthesiologists and anesthesia residents, and express an interest in what they're doing.