Williams was the Country Music Association's Male Vocalist of the Year in 1978. But since then his records have become increasingly predictable. Most of them are made up of a handful of sentimental tunes by veteran Nashville songwriter Bob McDill and a couple of medium-tempo rhythm numbers. All the songs are laced with a country-folk backing and designed to fit Williams' persona as a sensitive family man, working to keep the romance in his marriage. In True Love he breaks out of the mold only with Craig Bickhardt's ''Donald and June,'' a sweet, poignant look at a middle-class couple and how life hardly turned out as they'd planned. C+

