They way I have my pathing is a 2 wide stone dirt mix.
It goes well with most areas of my island except maybe a couple where I use some cherry blossom designs instead (Can't remember where I got the qr for them).
If however you meant custom designs, I don't use them for the most part and in the areas I do use them they're really subtle; so I don't really have any recommendations when it comes to custom designs.
Do you have any preferences? I think it's easier to find paths if you narrow it down to what kind of paths you want.
I'm still trying to decide what paths I want for my town. Right now I'm using a simple wooden path (2 tiles with a 1 tile option) but I'm probably going to change it soon. For some reason I'm having trouble finding paths that really suit my town.