Retro graphic style

I agree with this article: success of Minecraft or Revenge of Titans is inspiring in terms of what indie could do for gamers. Make better games not in term of graphics (Dwarf Fortress anyone?), but in terms of gameplay.
As gamer, what I'm looking for are new kind of gameplay elements, good story.
As developer, I'll try to do it but I don't have time (it's only a hobby) or resource to make better graphics.
A point of success of retro graphic style games it's interface: all must be easy to learn and to master, a lesson that many indies out there don't have clear in mind (Dwarf Fortress again). Gameplay is great, but what about a good, easy to use interface?

What do you think about it?