Stuck between the reliability of 20 meters and the volatility of 10, 15 meters gets overlooked. It shouldn’t be.
6 meters earned its nickname honestly. It behaves like HF one day and VHF the next, and nobody can fully predict when it will do either.
The low bands reward patience, big antennas, and staying up late. Working DX on 80 or 160 meters is genuinely one of the most challenging and satisfying pursuits on all of HF.