Price is a Blender prodigy in his own right, so nothing that you find on his site will be second-rate by any stretch of the imagination. To make it even easier, there now exists a Blender addon for Poliigon which allows you to browse and download textures straight from Blender without ever having to leave the software. While much of what Poliigon offers is unfortunately not free, there are still plenty of textures, models, HDRIs, and brushes that you can try in your own work without handing over a dime. The Poliigon site acts as an asset resource for 3D artists, and everything that you'll find on it comes directly from Andrew and his team. If you're a fan, you've likely heard him mention his own pet brand, Poliigon.
Only a very special type of curmudgeon can claim to hate Andrew Price, the energetic personality behind the hugely-popular Blender Guru YouTube channel.