Trying to make them look interesting is a bad idea, tried numerous times in the past. The best a designer can do is to make them disappear and not draw your eye. Trying to make them look interesting generally isn't the way to go. It's been tried and abandoned in California and numerous other places. I'd add some citations, but most writing about transmission lines is internal to the companies building and maintaining them. You can't make them into a beautiful sculpture because you ultimately need their utility of supporting the conductors, and that hardware is difficult to make aesthetically pleasing.