David Nail's first two top 10s on Billboard's Hot Country Songs chart, "Red Light" (No. 7 in 2009) and "Let It Rain" (No. 1, 2011), were tortured breakup songs that required more than 40 weeks to reach their commercial peaks. "My wife would tell you that moody is probably my No. 1, most consistent quality," he says, only half-jokingly. The singles' follow-ups never made it past No. 20.