when I was going through pictures, trying to pick out the most "bulky" men, I realized that it is a few things I like about the bulking look. First, it is that all the muscles look bigger and thicker with that fine layer of fat. Second, I love that strong stomach look where you can't make out individual ab muscles. Finally, I like how round and smooth all the contours of their body have; round pecs, round shoulders, thick round arms and legs, and fine round asses.
Here are more pictures of what I think is close to the bulking look!