Oh, thank God. I only visited Portland once, and despite being vastly different from Austin in climate and flora, the sea of billboards made it feel eerily familiar (and not in a good way). I expected it to feel more like Seattle, but that one thing made a world of difference.
Huh, could have fooled me. My first experience of Austin was long stretches of ugly billboards (I think mostly on Burnet and N Lamar), and despite living here for years that first impression never left. Now that I think about it, without some kind of ban of course there would be way more billboards where I now live.