If you have an account on The Duck you've got the ability to create a list of Recommended Comics which will appear on your profile page. To Recommend a comic on your profile page, click on "recommend comic" in the topbar which appears on each comic if you are logged in:
A recommended comic will then appear on your public profile:
You do not need to Favorite a comic to Recommend it – the two systems are independent of each other. To remove a comic from your Recommended list, click on the "remove" button next to that comic on your profile, as shown above.