Better Comments is a Visual Studio extension that gives you the ability to customize the font and opacity of your comments independently of the editor's font settings. It also adds four additional comment classifications, each classification with its own customizable foreground.
Or you can use your own custom tokens:
C#, F#, C/C++, and JavaScript
VB.NET
Python
HTML/XAML (Works only with single-line comments)
Multiline delimited comments (Works only in C#).
Single-line delimited comments (Works in C#, F#, C/C++, and JavaScript)
You can set each comment classification foreground color to whatever you like.
You can also set a particular comment classification font weight to bold.
Go to Tools => Options => Fonts and Colors
You can change the comments font settings without affecting the editor's font settings.
Go to Tools -> Options -> Better Comments -> Font Options
Check out the contribution guidelines if you want to contribute to this project.
See the changelog for changes and roadmap.