Problems with x-height is the first thing that popped into my mind when reading this article. Some fonts, even if they're both old roman fonts, will have drama

Problems with x-height is the first thing that popped into my mind when reading this article. Some fonts, even if they're both old roman fonts, will have dramatically different sizes: higher x-height, wider, thicker, etc. Just putting together a list of serif fonts doesn't necessarily produce good end results unless your design is totally fluid.