I was Navy, but I think the experience will generally be similar. I did an AEGD and ship tour where we did everything we wanted. When I got out, I was definitely ready clinically for private practice. Maybe a little slow with some procedures (crowns usually), but speed came quickly. I didn't do much removable in the service and do more in private practice as well as larger restorative and implant cases.
What you find out is that insurance is a big deal in determining what treatment is done. In the military, you say, "we need to do this, this, and this", they schedule and you do it. In private practice, you recommend treatment and they come back with, "how much will it cost and will my insurance cover it?". You manage a staff whereas, at least as a young military dentist, you may manage 1-2 assistants, but not really be involved in their life like in private practice. Taxes and overhead are certainly things you have to manage as well. If you practice in a big city, marketing and branding are more important.