For me code reviews are falling in two categories:
1. Just pass it by a second pair of eyes to make sure I'm mot doing anything really dumb or nefarious. Here I don't care who reviews it, and in my team the person currently on-call is usually the choice.
2. I'm working on something complex or that I'm not yet familiar with. In that case, I want a specific person, who I know is familiar with the technology or the project.
1. Just pass it by a second pair of eyes to make sure I'm mot doing anything really dumb or nefarious. Here I don't care who reviews it, and in my team the person currently on-call is usually the choice. 2. I'm working on something complex or that I'm not yet familiar with. In that case, I want a specific person, who I know is familiar with the technology or the project.