Hate surgery- welcome to the club. I did not enjoy it either as it made me physicially ill to be under the lights, scrubbed in with layers of clothes and not eating for stretches at a time.
Rounds on other services depend largely on the attending. Believe it or not some attendings can make 4 hour rounds really worthwhile while others make you want to shoot yourself after 10 minutes.
"Rounds" in EM can be walking rounds or check out but are definitely not as long as IM or other specialties. EM is not a good default because you don't like rounds and hate surgery. It is more involved than that and often attracts a certain kind of person. Have you done a clerkship in EM yet? Was it part of your 3rd year curriculum.
Other possibilities- pathology, radiology, ophthalmology, anesthesia, dermatology, rad-onc, neurology, family medicine, peds. We did not tend to have horribly long rounds on psych but this is probably variable.
You should check out Iserson's Guide to Getting A residency and look at the descriptions for the disciplines.