Criticism takes more space and attention than good things. When you like something, you just do. Maybe there are a couple of things that you really really like and you can write about them.

On the other hand things that don't work as you expect have some story to it - why don't you like them, what else did you expect, who does it properly, how is it affecting your workflow, how much you dislike that problem. I expect things like that to affect most reviews...