If big-city Easterners could imagine what life in Midland, Texas, is like, they might conjure up images of a remote, semirural, small city with mundane lifestyles, cowboy hats, and thick drawls. Well, most of the stereotypical descriptors don’t apply here. Other than for the Texas sand, wind, and heat that Douglas McGrath describes in his solo play Everything’s Fine, there is much in McGrath’s story about growing up there that is universal.