Deciding between Original ("straight") Medicare and a Medicare Advantage plan involves balancing personal flexibility against out-of-pocket cost control. Straight Medicare (Parts A and B) allows you to visit any doctor nationwide that accepts Medicare without network restrictions or prior authorizations, but it lacks an annual out-of-pocket spending cap unless paired with a Medigap policy. Medicare Advantage (Part C) often provides lower monthly premiums and bundles extra perks (like dental and vision), but locks you into regional provider networks and requires prior approvals.