I should clarify that by "fill" I don't mean "tile." I'm operating from the point of view where my species' preferences, let alone my preferences, fill less than 1 part in 100,000 of the resource-rich volume of known space, let alone theoretically available space. if that ever changed, I'd have to think carefully about what things were worth doing on a galactic scale. It's like the difference between decorating your bedroom and laying out the city streets for downtown -- if you like puce, that's a good enough reason to paint your bedroom puce, but you should probably think carefully before you go influencing large or public areas.

I would also wonder if some new thing made me incredibly happy if perhaps it was designed to do that by someone or something that isn't very friendly toward me. I would suspect a trap. I'd want to take appropriate precautions to rule out that possibility.

With those two disclaimers, though, yes. If I discovered fnord tomorrow and fnord made me indescribably happy, then I'd suddenly want to put a few billion fnords in the Sirius Sector.