I think your shop should reflect your passions as an artisan. If you have a speciality (a certain item or genre), you should focus on that. People will get to know you for what you do best. That doesn't mean that your shop shouldn't have a variety of items, however.
For example, I make jewelry. My speciality is a wire weave called viking knit, so you'll see that the majority of items in my shop are made using that technique. But I've also been learning to do some other techniques, and when I'm pleased with a piece I'll list it.