I'm like a child playing with batteries, cables and light bulbs. (What, you didn't play with these as a child? ;-) )
Only that it's now with virtual power plants and lines in OSM. :-)
For example, I'm happy that the city of Esslingen now has electric power in OSM since I filled the last gap between it and the nearby coal power plant:
http://www.openstreetmap.org/?lat=48.7146&lon=9.3488&zoom=14&layers=B000FTF
Next big milestone will be to complete the long line which (among other areas) supplies the city of Göppingen where I was born.
It's the one that runs to the West in this map:
http://www.openstreetmap.org/?lat=48.6992&lon=9.5229&zoom=14&layers=B000FTF
(Yes I know that the lines are redundant and that the power doesn't simply come from one specific plant. :-) )