if u feel like shooting a full instrument approach, by all mean go all the way down to MDA, or VDP, thereafter align yourself with the rwy extended ctrline and continue to land... and if u see the rwy from 10 miles away and decided to discontinue the instrument approach for a visual approach, then tell the tower u are visual, and u can line yourself up with the extended ctrline even before u reach MDA or VDP...
