If you're the kind of player who loves to build and wishes there were more options for construction, mining, and automation, then this is an amazing mod that will suit you well. Buildcraftīuildcraft is exactly what it sounds like, and it's extremely good at what it does. A great mod for wizard-loving Minecraft afficionados everywhere. This is an incredibly deep and complex mod that adds a whole new dimension to the game, integrating itself with just about everything that's already in vanilla - plants and animals, enemies, temples, etc. You can create wands and learn spells, discover ancient ruins, fight creepy cults, brew new potions, and more. It adds a huge amount of content that all hinges around creating magical items, wielding magic, and discovering the mystical all around you. If you ever wanted to deal with a stray creeper by throwing a fireball at it instead of shooting it with your bow, Thaumcraft is the mod for you. There's not a lot of documentation on the game, and you're encouraged to experiment with different combinations and find things out for yourself - perfect for the creative builder, inventor, and, well, tinkerer. It adds a huge level of complexity to Minecraft and is a great mod for people who like to tinker with Redstone, build, and automate their creations. Tinker's Construct is another mod that completely changes the way the game is played - among other tweaks, additions, and fixes, Tinker's Construct adds a whole toolbox of items that you can use to build, fight, and otherwise manipulate the world around you. This mod is not for the faint of heart - it's challenging, complicated, and very possible to die, but if you're ready to up your game, this is the number one mod to do it with.

Terrafirmacraft completely overhauls the survival aspect of Minecraft, adding several new tiers of tool creation, more intense hunger/thirst, and complex farming mechanics. If you routinely tear through your Minecraft worlds, reach The End and take down the Ender Dragon without breaking a sweat, and you're looking for a little more out of your builds, then Terrafirmacraft is the mod for you.

Best minecraft single player mods