You may also want to check out scallops, conamyds, scales, "the wave," and serrations.
What I look for is a combination of functionality, durability, and appearance. Functionality is by far the most important factor, but for the money spent on an expensive custom or semi-custom, durability and appearance become considerations. As far as function goes, the surface needs to provide grip when slippery (bloody), allow a reasonably easy grip adjustment after initial draw, and hopefully not tear up your clothes.
Traditionally sharp 20 lpi checkering seems to provide the best grip. Finer 25 and 30 lpi checkering is dressier with a little loss of bite. Checkering isn't as durable as the other surfaces and is costly to repair. Stippling is functional, but isn't as cosmetically pleasing. I'd probably opt for skateboard tape instead. If you cut the tape perfectly, it can look pretty good for the cost of 50 cents and 15-30 minutes of your time.
Scallops, conamyds, scales, and "the wave" are other unusual considerations. I think that scallops and scales look pretty interesting. Conamyds and "the wave" look kinda funky, in a good way. I really don't know about the functionality any of these metal works. On a custom item, I'd be tempted to try out scallops or scales.
For me, on an inexpensive project, I'd go with tape. On an expensive custom project, I'd send off the frame and a new flat mainspring housing for scallops or scales.