There's a noticeable delay between when the question list starts to render and when the excluded or highlighted tag styles are applied, i.e., there's a flash of default style. Instead of waiting for the DOM to be ready to apply the styles, you could use
document.write() to make an individual stylesheet like this:
This would still allow the list to be cached but make the rendering more smooth and hence the sites more usable.
Edit: The same can also be done with DOM methods.