From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
You know I love paper patterns. Here is one from Stephen. Say thank you!
Source Stephen Gilbert
Sort of like the back of a wooden board. Light, subtle, and stylish, just the way we like it!
Source Nikolalek
The image depicts a Japanese Edo pattern called "kanoko or 鹿の子" meaning "fawn" which has a fur with small white spots.
Source Yamachem
Another fairly simple design drawn in Paint.net and vectorized in Inkscape.
Source Firkin
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
Number five from the same submitter, makes my job easy.
Source Dima Shiper
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin