Centerline, there's no excuse for someone wanting to be called a professional. Lights are usually positioned to the side of the centerline markings, usually the opposite side from the terminal, so if you're on the paint you shouldn't hit them. If you fly two pilot aircraft, or want to, each day you could share the cockpit with a different crewmember, it makes the other pilot much more comfortable if you do things correctly. From established on final the aircraft's center of gravity should be on centerline. I say that because in larger aircraft cockpits should be upwind of centerline if there's a strong crosswind allowing the airplane when ruddered for alignment in the flair to be on centerline. I fly with many new FO's who seem to be content with letting the airplane do it's thing and that can be unnerving. Airmanship Always!