Though its 2013 predecessor, “New,” sounded unfocused, with a jumble of producers and indifferent lyrics, “Egypt Station” feels more intimate and personal. Self-doubt and anxiety creep into the songs, and his voice — bearing some of the weight of his 76 years — at times treads toward parched, scratchy weariness. The vulnerability is one of the album’s most endearing features. It skirts the-great-man-stares-into-the- abyss-of-mortality melodrama that has become a late-career-album cliche for many of McCartney’s peers. Instead it presents a plainspoken realism, an earthiness in keeping with his working-class upbringing. Uncertainties abound. As he sings on the opening track, “What’s the matter with me, I don’t know.”