That's one of those things I'm always trying to improve upon, I suppose. I still don't think it's half as cool as the 3D grass though. It helps that I married a graphic designer by trade and have picked up a lot of Photoshop tricks just by osmosis.
Anyway these packages may seem kind of small, but I actually don't have that many textures overall. Everything I've released in the last year or so consist of libraries made up from these textures, which I just mix and match and then will play around with tiling, color, and mowing patterns.
I like to think these are pretty versatile - and I'm trying to get out of the habit of calling them "green", "tee" etc because many of them actually work for multiple surfaces. Some of my best sets came out of simply experimenting with using a rough as a fairway, for one example.