I'll throw out a few comments.
Pros:
Flexibility with your daily schedule. You want time off, you make the schedule.
Oodles of money.
High volume (there will always be people in pain).
Own/run your own business/clinic.
Continuity of care and close physician patient relationship (can be a negative for some as well).
Cons:
Back to H&P's and progress notes and dictations.
Clinic/office overhead (staff, materials and supplies, rent, etc.)
Physically demanding (Standing with 20-30 pounds of lead on you).
Radiation exposure (Most of your procedures done with fluoro).
Increasing numbers of practitioners encroaching from other fields (PM&R, neurosurgery, neurology, IM, etc.).
Decreasing insurance reimbursement (problem with every field)
Bizarre/manipulative/med seeking patients.