I've not even opened the store and I'm already thinking about what to add next.
1. More Stoic Quotes
I want to spread better thoughts out into the world. What leads to happier people reading 'If you can't handle me at my worse you don't deserve me at my best' or 'A man is as unhappy as he has convinced himself to be'? I hate seeing quotes like the first one it breads angry and narcissistic people whereas the second quote leads you towards self improvement.
I bought an amor fati/memento mori watch. It's just a skull with a really nice design, but every time I look at it it reminds me that life is short and to appreciate the present. I'd like to do the same for my products. One for each virtue and amor fati/memento mori.
I like sketches, but this might take away from the premium look that I'm after.
4. Holiday Themed
I could base designs/quotes to fit holidays. And only sell for a short time. This will increase scarcity and boost sales for the rare item.