Insulating the boiler supply & return?

Does it make sense to insulate the copper supply and return from the boiler to my wall with my circulators and the all the pipe involved at this location?

Probably wouldn't hurt, to keep more heat in.

It depends...are you trying to heat the boiler room? If the boiler is in your basement and it doesn't get uncomfortably warm, it is a matter of preference. You will hold more heat in the system, but don't expect a huge drop in coal consumption.

It depends on how warm the space is verses how warm you want it. If you are overheating in the space with the pipes, then insulation helps control the heat loss.

I insulated my pipes because my boilers are in a remote building from the house. I only need to keep the building above freezing. Any more when I am not out there is wasting coal.

I also insulated the primary but not the secondary piping in my house. I was getting too warm in my basement and again I didn't want it that warm down there.

If your temperature is fine, don't worry about it. You want some heat in the basement to keep the humidity in line.