My favorite frame for the moment is Palladio, in black/brown. It's a mildly distressed wood frame with a beeswax finish. The dark tones complement most of the "Dakota Montana" and "Stories Told in Things Left Behind" series. I pair it with TruVue's Conservation Reflection Control glass (CRC), which pairs a diffusion layer to keep glare down, with a UV protective coating on the back.
The Gallery Frame
Another old standard is the black wood gallery frame. On the larger pieces, (20x26 and above), it's a 1 1/2" matte black style, with simple square lines. For smaller pieces, a variation of this frame in a 3/4" molding is used. And as a third option, I offer a metal frame with a brushed "Florentine" finish, also in black.
Typically with the gallery frame, I use TruVue's Conservation Clear glass, which is offers less expensive UV protection, without the reflection control.
Larger pieces (up to 30x40) can be framed and glassed, either in the Palladio style, or in a black gallery frame.
I've also begun producing larger prints in a glassless configuration. A canvas photograph is laminated to a backing board (GatorBoard) and then framed with a combination linen liner and frame. I use a dark-toned 2" square frame with a 1" linen liner, as well as a wider 3" rustic frame paired with a 2.5" liner. These are lightweight, and avoid the obvious issues of shipping and hanging a larger piece of glass. On occasion, I also use acrylic glazing to keep the weight down for a more traditional presentation in a frame.