Clothing Design's I'd like to see

Hopefully this will help me think of new pieces for my site 

1. Black and white line art

There's something beautiful about line art.  I'm not sure how I could tie it into the overall theme of self improvement though.  A quote? Song lyrics?

2. 3 panel comics

I could do a 'The Rocco Effect ' comic with less panels.  This serves as advertising as well as looking cool 😎

3. Halloween

I could do spooky themed designs.  I could share outlooks on death/evil.

4. Back art

Plain front with a full back design.  Not my personal taste, but I've noticed a lot of people seem to like this look.

5. Bushido

The philosophy of a Japanese samurai (still need to read more into it) Japanese based designs would look really nice and opens up a new market without going off brand.  I can explore more philosophies and share the part's that resonate with me.