I play several different 'building' games. If I could take all of them, combine, I would be content. However, they each are lacking in an area.
Rift. Pros: Great models, awesome freedom to build anything from your imagination. Tons of lighting, fog, etc you can place to set a mood in your build. You can buy models from their store & also craft some. Cons: You can't modify the landscape ( voxel ). While the models are great, they are game specific.
Medieval Engineers: Awesome medieval building. Freedom to manipulate the landscape ( voxel ). Grow crops. Build animated devices. Awesome modelers that bring in hi res models into the game. Craft models. Cons: No water in the game. While there are lovely tree's in the game, there are no tree models to place around except an apple tree.
Note: ME will be the game to beat if they can get water, tree models you can place, into the game.
Rising World: Lovely game. Can manipulate the landscape, grow crops. Water, tree's plants you can place. Craft models. Cons: Lack of lighting, fog models to set a mood. Buildings look 'washed out'. Low res models.
Note: This will also be a game to beat if they can fix the 'washed out' look. Bring in some hi res models.
EQ: Pros: Lovely models, you can decorate the inside of a building to your heart's content. Cons: You can not custom 'build' a house. No outside building.
ESO: Pros: Awesome new housing. Great models. Craft models. Cons: Limited slots in housing to 'place' models. You can not custom build your house.
Lotro: Pros: Ok housing. Good models. Limited model crafting. Cons: Limited slots in housing to place models. You can not custom build your house.
Sims: Pros: Custom housing. Lots of models. Extra model packs you can purchase. Cons: You can not walk around in the game. No real time experience, lighting, mood.
So developers here is my personal list of what kind of game I would continually pay out $$$ for.
A beautiful graphics game engine (example Unreal engine) where my character can literally walk around in the game & explore.
Water, tree, models a must.
Housing: Piece models, which means I need many wall/roof/floor etc options. I also want pre-made buildings.
Rich, high res models to use in my houses, buildings.
Animals I can tame, breed, kill for hides/trophies/food.
Horse I can ride.
Crops I can grow.
NPC's to use in a store/crafting area, farming etc.
Ability to play in 'creative' offline mode or 'survival' (see above: Medieval Engineers)
Be able to farm some mats. I do not want to have to craft every single model, but do not mind crafting a few.
Model Expansions I can buy. Different era's: Medieval, Gothic, Modern, etc, the list is endless. Example of one expansion pack: Medieval living room furniture. You could make so much $$$ (see Sims)by breaking up packs and selling the additional furnishings by per room pack, same for outside models. I would shell out the cash for them.
My ideal game would look somewhat like ESO/Skyrim landscape/experience in an empty world.
Sims has made a ton of $$$ over the years because there are a lot of us gamers out there who just love building. If I want combat, there are hundreds of other types of games for this.
Look at Minecraft. We are out there...thousands of us, who just want a better building world & are willing to pay for it, are you willing to build it?
Thank you for reading