This applies to both TrueType and bitmap fonts,

I personally hate the Ascent and Descent guides because the values of them are not actually even relevant to my fontdevelopment.

The numerical size values (aside from advance widths) that are relevant to me are:

• Em Size (not a height or width, but a reference size used in ppem "pixels per em" values) for example 2048
• WinAscent (the font top) for example 1884
• WinDescent (the font bottom) for example 514

As for all the others:

• Ascent and Descent are not relevant (they're not even saved in the TrueType file, only their sum, Em Size, is)
• I set Typo Line Gap and HHead Line Gap to 0
• I set Typo Ascent and HHead Ascent to WinAscent
• I set Typo Descent and HHead Descent to WinDescent

So, I don't want to see the Ascent and Descent guides because they aren't relevant to anything I do in my fontdevelopment unless it just so happens that the em size is the same as font height, which in many fonts it isn't. I would like instead to see WinAscent and WinDescent guides because they are the ones that determine the actual boundaries of height.