Terraria is an amazing game, as you can do so much things in it, like build a giant castle, or battle a pair of mechanical eyes with some amazing music playing during it. This entire concept is made better with other people, be the entire workshop (we'll get to that later) or multiplayer co-op or battle servers. The workshop expands this entire subject, as you can upload worlds that you're proud of or download worlds you think will be useful or neat to explore. Texture packs can also change the way you see the game, like texture packs that make some old sprites look newer and cleaner, or make some things more visually appealing, such as the jarless critters texture packs. All in all, amazing concept and deserving of all its praise and love.