Like any mature decision that substantially affects the trajectory of your career and life, deciding to commit to military service requires self-assessment. There are a lot of specifics in this forum about the various branches and what has and hasn't worked out for military medical folks. I hope you have taken or will take the time to read through them. Some experiences are perennial and seem to affect people who entered 20 years ago just as much as they do today; others represent new demands of the military on its members and may change by the time you are on active duty where the military is a part of your daily life.
The desire to do service in a recognizable way that the military affords is really not enough.
There is no one "test" you can apply to yourself, but if you object to fundamental requirements of the military, you really should not join. You must be willing to accept orders and do your best to follow them. If you are assigned to deploy for a year, that is what you will have to do, and others will be counting on you to do your best, and do a good job, along the way. You also have to accept military lifestyle disciplines. If your workday starts at 0730, that is when you start work. You have to wear a uniform, maintain weight and fitness standards, show appropriate courtesies and observe military regulations that affect how you spend your free time. You do not have the freedoms you would have as a civilian. You are not free to use drugs or even associate with those who do. You cannot do business with anyone you please, and you are not free to say anything you like, no matter what you may think.
Despite your willingness to do all of the above, there are harder realities you must also accept. While you may "love" being in the military, there are many circumstances by which you my feel the military does not reciprocate. You must understand that the services are under no obligation to please you and the exodus of the majority of HPSP accessions early in the years of a typical military career ought to be strong evidence that many medical officers conclude their futures would be better without a military obligation. That doesn't just mean more money elsewhere, although that is often the case, but it also means opportunities to train in a chosen field and the opportunity to train when you want. A lot of important things in your life will depend on the latter; it will have a lot to do with how soon you will be able to stabilize your life and have more time for family and other important things. Don't assume the services will help you in that way.
Good luck with your decision. I guess I would add that if you have any reluctance at all, walk away.