So I'm planning on making a level editor model pack, featuring a large scale of models for everybody to use in their maps

So there are 2 thing with this:
I need ideas for models, what would you like to have?

The next thign is a little more technical, and unless you got experience with modding you can stop reading here.

So im sort of imcompetent for modding. I have very little knowledge of c#, and although that's slowly improving, I dont want to wait for that to start making mods. The problem is that once I add a texture (.png) it only picks up one colour and not the actual texture I want it to

I suspect this is done with:
public enum blockmaterial
{

}
Which I read in the documentation, but from there I'm totaly stuck.

Anyways, thanks for taking time to read this, I hope I can get some help, and if you got an idea, throw it in the comments.