Ideas for a simplified crafting system?

I'm making a business plan for a game right now and this thread over in r/truegaming gave off that people really want a game based around crafting.

Now the problem becomes, what is crafting? I've been thinking about what it means to craft in games over the past couple weeks and there's a lot of variety that writing a crafting game might just be too complex for my skillset.

There are games like:

• Minecraft where the crafting is a grid.

• WoW or EVE where crafting is a process.

• Harvest Moon where crafting takes time and planning.

• RPGs where crafting simple enhances items/abilities.

• MMBN where crafting is like programming.

All of these systems have their merits, but I would like to hear about more systems and ideas while I write up a draft.

Thanks,

Xdes