The author of this article is a contractor who made the conversion from gypsum drywall to two-coat plaster. Although it's more expensive, the plaster finish he applies has an appealing surface -- textured and slightly roughened -- and makes curves and contours much easier to create. He explains how he does it.
Decorative Plaster Finishes - Fine Homebuilding
Damaged plaster wall can still be salvaged – Orange County Register
Sculpting a Radiused Crown Molding in Plaster - Fine Homebuilding
Drywall and Plaster - Fine Homebuilding
Taping Fastener Heads and Seams: Second Coat - Fine Homebuilding
Preparing Walls for Painting like a Pro
Plaster Tip: Applying American Clay Over Natural Hydraulic Lime
Mist Coat On Fresh Plaster Over An Old Vent Do We Need To, 41% OFF
Plasterwork - Wikipedia
Gold Bond Kal-Kote Smooth Finish Plaster 50002660 - The Home Depot
Tadelakt Shower Plaster Color Atelier Paint & Plaster
Plastering]