I share your sentiments tr. There have been a few people at my school, but not too many, who venture to not do a residency.
The question is this (and I don't really know the answer to it and perhaps someone else can help): What advantages does an MD give you if you were NOT to undergo residency training? I mainly see the MD as a great way to outcompete the straight PhDs to get tenure track positions and have an easier time getting grant money. I know this sounds cocky and arrogant but I've worked long and hard for that MD/PhD and I wanna cash in on my prize damnit!
There are so many people getting PhDs out there and in this age of credential inflation, more degrees help. However, what additional advantages does DOING a residency confer over getting the MD and calling it quits?
I personally have said to myself during the painful barrage of 3rd year clerkships, "If someone can guarantee me tenure and grant money, I would so quit after getting that MD." Fortunately, I've found a field in medicine that strikes my fancy and is very closely related to my passion for basic science research. Hence I now find myself deciding to duke it out through a residency albeit the shortest track possible.
Postdoc whether you're an MD/PhD or a straight PhD is a risky proposition. What I have learned from my experiences as a graduate student is that your success is dependent on not only your intelligence and hard work but also on a whole slew of external factors, many of which are out of your control (e.g., support of your mentor, quality of your mentor, quality of your project, the sexiness of you project, whether your lab is utilizing the right technology to answer the given research problem, LUCK and SERENDIPITY, etc.). If you're up for the risk and don't want to do patient care, one should consider doing a straight postdoc. If you're not a risktaker, then do a residency and use your medical field as a backup plan.
I know of several very intelligent people who have not done well in their postdoc labs...they will not be as competitive for tenure track positions. I know a few who have excelled tremendously in very short periods of postdoc time. I don't know where I will fall ... hence I feel I need a backup plan should research not work for me. Also, I hear that if you have a clinical appointment and are interested in research, it will be easier for you to have a lab. And considering that there are so many grants available to those who are MDs (and the number of MDs doing research is relatively scarce compared to the PhDs doing research), I don't foresee a terrible amount of difficulty in acquiring some sort of funding.
I don't know...I'm rambling here but this is what I can come up with in respect to my stream of consciousness thinking.
And if any of the above comments are wrong, please let me know. I would appreciate anybody clearing up any misconceptions that I myself would have.