Easy. The Kingdom of Ikros in LEGO. I'm not a huge fan of LEGO using stories, but hey, I gotta say that would be really really cool

On top of that... a build your own castle army set. 30+ figs in one of three colors, identical accessories between, and a small floppy disk with enough software and die-cut sticker paper to customize the figs with whatever design, logo, or faction you'd like.
2. What types of themes/concepts should LEGO stay away from?
Anything that strays away from LEGO's original trinity of creativity - Duplo, System, Technic.
3. Are there any community projects/products that you?d like to see turn into a LEGO set?
CCC sets come to mind, but since they're based on actual LEGO product standards anyway, go figure, huh?
4. Are there any projects/products that we should stay away from?
(Non Ikros) Story themes, anything with a distinct plot. Once you get a plot, you get unique characters. Once you get unique characters, you get one, main unique character in every single set (*cough* Harry Parter *cough* luke skywalker/darth vader)
5. What types of products/themes/concepts do you think are missing from the assortment over the years?
Realism. I don't have a problem with fantasy in the least, and no LEGO set has every been 'realistic' (minifigs != human being). But I cannot stand fantasy that doesn't at least have a foot planted in realism.
6. Are there things we?re missing in general? On box? In the instructions? In the box materials?
Boxes are too big, instructions don't need comics.
So.... missing? Neat flip top boxes with a window showing you the parts and.... parts. Too few parts in sets for their price point. Get rid of the huge all-in-once pieces, stick with bricks, its what your'e good at.