Add a setting for "Solid" in the leading field of the type panel
Illustrator defaults to "Auto" in regards to leading - about 120% of the point size of the type. When using display faces, I often find I set type a lot tighter - usually around the same leading as the point size. It would be really helpful if there were a setting for that in the type panel, so that as I change the point size of the type (say from 24 pts to 72 pts) the leading would also change automatically from 24 pts to 72 pts - just as it would from one size to another when the leading is set to "Auto."
This would save me the trouble of having to reset the leading every time I adjust a block of text. Think of this as a "sand in the swimsuit" issue - just one of those minor annoyances that have a simple solution.
We can change the value Illustrator uses as 'auto' in Justification dialog, which you can access via the Paragraph panel’s menu. Change 'Auto Leading' to 100% to get what you want.
If you want this setting to be applied to all new text objects, you should open Paragraph Styled panel, and edit the [Normal Paragraph Style].
If you want this to be applied to every new document you make, you should learn about editing document profile files Illustrator uses as core templates. Just don’t forget to backup these.