We experimented with a bunch of masonry-style layouts while designing our new feed, and I shared some of our iterations in the blog post.
tl;dr: (we observed that) grid layouts where each block looked exactly the same were easy to scan but not engaging; when we added visual interest by varying the sizes, readability suffered. So we settled on something where cards have different sizes, but titles still line up.
We didn't do any fancy eye tracking tests, so I wonder if our personal anecdotes about some options being more "comfortable" and "interesting" than others have any foundation. What's your opinion, any observations that you could share?