Facebook Graph API - How do I get everything I like?

I think using Graph API will do what you want. A good way to look at the queries used to get the data is to first look at websites and mobile apps to see if they provide the data you want. This is because websites and mobile applications will use the Graph API or FQL to retrieve the data available through these sources. So all you need to do is go to the page with the data you want, and use a network traffic capture tool such as Fiddler to see the requests that are getting the data.

It turns out that there is a page on the website that displays all the objects that users like. To view this information, select "Activity Log" in the drop-down menu at the far right of the FB toolbar. Then select "Likes" from the left column. This view will display the data you are looking for. Unfortunately, in order to obtain this data, the application requires:

https://www.facebook.com/123456/allactivity?privacy_source=activity_log&log_filter=likes

where "123456" is the FB user ID. Returns an HTML page, not JSON.

As the answer to this question points out, multiple Graph API and FQL queries will be required to retrieve objects in the activity log. Then you need to skim through the content to see if it's something you like.