I love the 4th. People need to be really careful with "modern" design. Sometimes it looks dated and the furniture and style soon become "old", such as the 1st one. I have seen many of these types of designs, they look great in photos but in reality they suit few people's living style "i.e. 70's style" Just my 2cents worth, all look great though.

2nd pic with the colorful accents.

The 2nd is my first choice. Color and comfortable seating seems to give the modern style a cozy feel. The 3rd space would be my 2nd choice, light and airy. My last choice is #1. The furniture looks overwhelming and awkward.

I like the 2nd pic. Modern minimalist.

Can I say.... none of the above