Underground cables are pretty hype. I hit a point in CS1 where I used mods that just ran the power under the roads, and I was dreading having to make above ground connections for the new one.
I do worry that power might require too much micromanagement for certain styles of play. If you're playing the game in a city manager style it seems like a fun challenge, but in an unlimited money city that functions more like a model, it could get tedious. Mods will probably fix it if that is the case but it could still be something to think about.