Joel Rabinovich

I am not an expert in web design or UX but in my project we use background colors for the portfolio pages, (you can see the example and identid.me) and I was wondering if it is not the most appropriate visually. On the other hand where is the limit of what is visually acceptable and be different on the internet not using white backgrounds, what is your opinion? Thank you very much, it will help me to improve knowing different opinions.

I'm wondering what this community thinks about apps which make you addicted to them. Do you consider this to be a beneficial feature or should apps refrain from navigating these waters?