Hard to pick, but these are a dozen favorites over the years...
SW Flank of Sierra Negra, Abiquiu
Travertine Sipapu, Ojito Wilderness
Sunrise on Shiprock
The Great Hoodoo, Abiquiu
View of La Bajada from Tetilla Peak
Storm near La Bajada
Storm on the Plains, Watrous, NM
Dinosaur Egg Factory
Monsoon Storm at the Bisti
Los Gigantes I, Zuni
Chimney Rock and Pedernal, Ghost Ranch
La Cienega Sunset