I like a well-made gun, no matter what "grade" it may be. You will find 18th century pieces that were slapped together, with rough inlets and mis-shapen stocks, and more. On other examples, you will find fabulous craftsmanship and design. These guns were made for a market with a wide variety of income levels.
The architecture is the most important element in my manner of working. Then comes the mechanics where touch hole, lock and trigger location and function must be top notch. After that, decoration, only if the gun wants it. I like a pleasing gun, but it doesn't need to be fancy.
If your skills are limited, do the best job you can. If you want a fully carved and engraved Kentucky, but don't have the skills yet, work toward that goal with practice pieces. Skills don't just happen. Drawing, carving, engraving, inletting, stock shaping, etc, are all skills that are built one project at a time.