I'm not sure what to make, but I have bobcad and autocad along with an industrial CNC machine, so I could do whatever I wanted to. If anyone is good with CAD software I could machine things out pretty easily...

I would produce different hands and arms.

Imagine adding various Megaman blasters onto your minifigs, or some arms with elbow joints?

I'd make parts/acessories for city minifigures. I'd also make some custom guns and military equipment.

Figured I'd reply, what we see all the time are custom minifig parts, so, I'd like to sell more items for houses, interior and exterior, this would be great and you could easily do themed stuff, apocalypse, steam punk, city, fantasy, sci-fi, etc. Aswell as plants, trees, and for animals you could probably easily create your own using existing TLG molds, e.g. the horse mold could be used to create a giraffe, just by extending the neck, personally I'd like to see a more rigid elephant like the polar bear and a brown polar bear, not the new one from the city forest police station. You could also create some big cats in a similar way, somehow making a bigger dog mold and resculpting the head? Maybe a more experienced customiser could have a go with this?

Medieval / Knight body armour, more designs and variation than the limited products around.

The Great Helms that brick forge make are great, but there needs to be more breast plates that cover the minifigs torsos. There seems to be plenty of military vests.

Even the breast plates with the neck peices incorporated would be a good start.

I think you should make a shire horse. It would be bulkier and taller than LEGO's horses, I and other pirate/castle fans would buy.

Oh and, the reason for these horses would be pulling carts, riding up mountains, long journeys etc.

Edited December 10, 201113 yr by Captainmorgan

I'd do a lot of Video Game things, because they sell. But I would also like to see more innovative bricks, like ones with a variety of angles, with studs on them, as well as stud reversers, and plate reversers. I think that would open up a whole new can of worms for building MOCs.