Also keep in mind that while the first two (Grass and Dirt) are in fact free, all of the others cost 2,000 Nook Miles to unlock.
Dirt Path
Stone Path
Brick Path
Dark Dirt Path
Arched Tile Path
Sand Path
Terra-Cotta Tiles
Wooden Path
And finally is the custom tile option. This is the same as opening up your patterns and laying them out by hand, but by using the tool you don't have to open your menu each time to place a new tile. Simply set the custom pattern you want to use, and then walk around with the paint brush to slap it on the ground. This doesn't do anything special for them however, so you can still erase them by pressing Y if you're not careful (meanwhile this is not the case for other placed paths thankfully).
Well that covers it for now! Hopefully more options get added in the future, but even if they don't the custom patterns offer nearly unlimited possibilities to make your island your own. Still nice to have official paths though.