May I, as a newbie to the forum , but fairly long-term user, add my four-penny-worth to this lively discussion.
Firstly - thank you for a great free product.
Secondly - Some people (me) struggle to see pale grey text and can spend frustratingly long periods of time searching for items, such as scroll-bars, which are hidden until you hover over them. Keep it simple, fairly bold contrasts and intuitive please.