I can't help but think the answers depend upon what the individual has had. I know it does for me... It also depends upon what you're making/want to make. I'd like:
A shop with plenty of room for some separate work areas (forging, grinding, finishing)
A shop with LOTS of outlets and wired for 220, not just 110...like I currently have...
LOTS of lighting, both from above and work station lighting
A better forge, maybe one with a ribbon burner because it intrigues me
Bigger anvil
Hydraulic press
Surface grinder to go along with the mill
A horizontal grinder to go with the KMG and disc grinder
A nice sized heat treat oven
Ohhhh, and a nice MIG welder and a plasma cutter....
And to finish things off, a nice big air compressor and blast cabinet
It's good to dream, right...?
Jeremy