I use Bootstrap. As a designer I really appreciate the pragmatism of Bootstrap Typography set of rules. I can't tell the other frameworks but by watching the do

I use Bootstrap. As a designer I really appreciate the pragmatism of Bootstrap Typography set of rules. I can't tell the other frameworks but by watching the docs of Foundation I see typography rules. I like to use Google Fonts now (typekit on the past). Big fonts for reading and headers, not so long paragraphs and you will achieve a good level of readability.