Sorry for oddly worded title, but like Reddit, Youtube, Pandora, ect.. That changes for each person. Thanks

You can build the 'template' using RSD or RFF or RBB but to have the site content dynamically change based on who the user is... requires (a) knowing who the user is via cookie or login and (b) changing the content based on the information stored about that user's preferences or habits.

And all of that activity is outside the scope of your site designing software. You can include javascript to do a lot of the work - e.g. import the script as a resource and place a reference in the header or footer area. However the stored information is (probably) going to be coming from a database that you query based on the user's ID and the returning data will be placed on your page via AJAX.

I would recommend spending a bunch of time browsing the javascript, PHP, and MySQL pages of w3schools.com for the specifics. I am working on a project that involves a bunch of dynamically placed content and plugging away at the issues I run into from all angles available to me - ranging from w3schools.com to Udemy classes and safaribooksonline.com
resources. I've hit the point when I realize that I need to develop my own custom-built CMS because everything I've looked at turns out to be a square peg that is NEVER going to make my client happy. (Drupal, etc. etc.)

Hope this helps,
Gordon