What methods and approaches do you use when conducting code reviews of another developer's code?

When reviewing another developer's code, I pay attention to the following aspects:

• Readability and coding style: Does the code adhere to the accepted style, are variable and function names clear?
• Logic correctness: Are there any obvious errors, is the algorithm implementation correct?
• Error handling: Are exceptions and errors handled properly?
• Performance: Are there any inefficient operations or redundant calculations?
• Security: Are there vulnerabilities, for example, related to data input?
• Testability: Is the code easy to cover with tests, are there unit tests?
• Adherence to architectural principles: Are layers, dependencies, etc., maintained?

For example:

// Check that methods have understandable names and are not too long
// Check that there is no code duplication
// Check that language constructs are used efficiently
// Check that there are comments where the logic is complex

I also provide constructive feedback and, if necessary, suggest improvements.