Can I customize the MorphReport?

Yes!

When you're logged in, click on your name in the upper right corner of the screen. Scroll down and click on "User Profile". On that page, you'll see a section for "Your Interests". There you will see a drop-down menu named "Want To Buy or Currently Own". This determines which MorphReports you'll receive, if enabled in Settings. 

Make sure the categories you wish to see are the only ones selected.