> It is not that business form, but some ppl use colorful format to emphasize some text, which basically gives same text in the email, which makes the reader (in plain text) easily miss that part while skimming.

I consider that a feature... On some email lists I'm on, there are endless complaints of how some people don't like some elses font/color/size etc. Using mutt I don't see any of that distraction, I just see the text. That's a win in my book.