There's a difference in the colour of the tags. Here's a screen grab from the "legend" on the [tags page](https://tex.meta.stackexchange.com/tags):

[![enter image description here][2]][2]

- `{required-tag}` has RGB = (68,68,68)
- `{tag}` has RGB = (85,85,85)

However, this is too close to discern when both are **bold**. For example, on [Meta.TeX.SE](http://meta.tex.stackexchange.com) one is required to have one of the four tags [meta-tag:bug], [meta-tag:feature-request], [meta-tag:discussion] or [meta-tag:support] which are one-boxed in **bold**. With the current setup *all* tags are **bold**:

[![enter image description here][1]][1]

I enjoy the feature of having certain tags represent something other than the usual content. For example, the red colour of the moderator-only tags: [meta-tag:status-completed], [meta-tag:featured], [meta-tag:status-bydesign], [meta-tag:status-deferred], [meta-tag:status-planned], [meta-tag:status-reproduced], [meta-tag:status-review], [meta-tag:status-declined] and [meta-tag:status-norepro]. This is lost though with the addition of making all tags **bold**.



  [1]: https://i.sstatic.net/6YtS1.png
  [2]: https://i.sstatic.net/SEVcQ.png