I am curious if people here have any 'pet hates' of common things you look out for when shopping for new type. Maybe even the straw that broke the camel's back in motivating you to stop using other people's type and make your own
Thomas Phinney recently published an article in Comm Arts about this sort of thing in terms of optical adjustments,http://www.commarts.com/columns/know-font-sucks
There are a few glyphs with more complex strokes that I look at like the 8, ampersand and double story g, which are a bit trickier to get right.
Another example, I know it's quite common for typographers to re-space their fonts, and to check the kerning of k-something or other pet Kern pairs.