Surgery is the best field in Medicine, especially Orthopedics!!!!!!
I started medical school thinking that I will probably do either family medicine or ER and then pursue a sports medicine fellowship. However, after spending 3 months on Internal Medicine and 1 month on Family Med, I would rather stick a 9 inch nail in my eye lid than to spend another month doing primary care medicine. Life gets really boring when you come to hospital in the morning to pre round on your patients, and then you round with your resident, and then you round with your attending, and then you talk more about the differiential dx, how you would treat each differential dx, and what is the most likely dx of this particular pt, and then you go type/write in orders for your patients, after more talking and writing notes, there will probably be a lunch conference for another hour of lectures, and the afternoon is spend on more paper work and chating with the patients about the plans, tests, etc, etc. In the community, a FP doc spends most of his day dealing with Med adjustments/refills, tons of the same/common diseases like diabetes, HTN, etc, with little diversity...... Don't get me wrong, there is nothing bad with being in the Primary care field, it is just not for me. Some people really like the thinking and discussions involved with the internist fields and I definitely agree that the Primary care docs are one of the most important (if not THE most important) group of docs in the field of medicine because they are usually the 1st person to see, to refer, or to make a diagnosis and treat a patient. So their personal decision on the management/plan is very important to the outcome.
But for me, I really enjoy using my hands to treat the most serious of diseases, to be able to see my results = instant gratification (not a 20 point improvement in the systolic pressure), taking on the responsibility of being the last person/hope for a patient,.... even though, I might be in the hospital 20-30 hours longer than the internist, but I would rather be spending 80 hours doing something that I love, vs. spending 50 hours doing something that I hate. I will be starting an ortho residency in a few weeks and I am pretty psyched about it!!!
The bottom line is that in medicine, there are many many things/specialities that you can pursue..... Doing surgery have its advantages and disadvantages, just like almost everything else you decide to do in life. Just look at both sides and pick a speciality that you "feel" will make you happy. And if both internal medicine and surgery will make you equally happy, then go and be the internist!!