I would like to show you guys one of the best texture packs there is. It literally cahnges everything in the game. But thats not the best part. The best part is that you can customize it. Click on the link below and it will take you to the page where you can customize your choices, you simply click on the tab, whether it be vegetation, stone, or processed metal and you go through the choice and check off the one you want, then close the tab and download the pack. Then you just install it like a regular texture pack.
http://painterlypack.net/customizer.php