Just sounds like you need to find a project and avoid any "easy" approaches to achieve that project. It doesn't matter too much if you can't make nice looking builds, just do the best you can, just avoid those 9x9 cobblestone structures. You might want a brief break, then one day you'll see something, which will plant the seed of an idea.
Currently I've spent 3 nights in a test world trying out different things for a big project in mind.
I want a high tech facility using Mekanism, and other mods when Mekanism fails me (and avoiding MFR and massive quarries). That includes the highly expensive 5x ore processing chain. But I want to build the walls/floors/decoration out of MFR seared bricks and the 3 tiers of ICBM concrete. All expensive building materials when you need a lot of it. Biggest hurdle is clay. Mekansim can make clay using dirt, so I need a way to make dirt. Only way in my pack is to use a Forestry Moistener, so I need to somehow integrate a wheat farm(s) into my build.
Plus, I'm adding an extra challenge of not using infinite water via any method that replicates infinite water source blocks, but I don't want to pump an ocean dry either. That means Forestry Rain tanks, Railcraft Water Towers, and I'm even going to make a large build of Accumulators to pretend it's a wind trap type of thing (think of Dune). The Mekansim processes need a lot of water for it's 5x ore processing. Now I've added a Forestry Farm, that's more water. Water is going to be a big problem beyond the hassle of plumbing in some pipes.
Then I want to have all the resources stored in an AE system, that's going take a lot of power, and so is all the Mek stuff (configs in pack increase power requirements), so along with the water shortage, I'm going to have power shortages. I'll need to build some failsafe systems into the build, then build a Big Reactor system.
Yellowite isn't renewable by default, but my pack has a horribly expensive way of producing it, building that will be a pain, then I need a way of feeding that system to make Yellowite.
Then I want some Thaumcraft iron golems running around the place just for looks, so I'll need to take a break doing a bit of Thaumcraft stuff. Plus for looks, some Railcraft Smokers and if they can be redstone controlled, activate them when the machines are running (if possible, haven't a clue!)
Plus a side goal is to try and make use of every resource that comes into the base. That could mean even more technology. I may even have to add some custom recipes to ensure that the useless can be processed into something else slightly less useless.
The above is only some of the stuff I want to put into my build!
One all that is done, (phew!), then I'll be building a space rocket to fly to the moon, then to mars, then a orbital base. All require a ton of resources. Oh, plus build a stargate on each planet.
By the time all that's done, I think I'll be ready for Minecraft 1.9.