When I first setup Drupal on this site, I had pretty much decided that I would use an existing theme from Drupal's theme repository. And for a while, I did. I reviewed a lot of different themes, from very basic themes to more visually appealing ones. I eventually settled on one or two and gave it a go. This worked okay for a while but over time, I came to the realization that:
- themes can have bugs too (some serious)
- debugging other people's CSS and PHP is a lot of work
- heavy themes can really slow down your site