Collections: heating grates

Since this house has gone through many owners, many tenants, and many decades, it has ended up with an eclectic mix of fixtures and materials. These are small details that don't come through in other posts, so this is a chance for me to show you the "collections" in this house.

I kind of wish the house had more exotic grates, but the basic rectangles work too. Each grate is a different size, and there seems to have been disagreement about how far away from the wall each one should be.

These are the only two embedded in the wall. I'm not sure why one grate fits and the other doesn't.

Yep, someone painted over the grate in the bathroom.

The one on the left is actually quite large--it's probably twice the size of any other in the house.

Would you replace boring grates with something more decorative?