What SharePoint features or function that depend on My Site Host

Hi

I like to use the social features in SharePoint 2013 but I do not have a need to use My Site at this time but I think there are certain social features that require My Site created for them to work. 

Can someone help list out all the social features or SharePoint functions that are require My Site to work?

In case if there are any,  can I just configure My Site Host only and not give permission to users to create own MySite?

Thanks for any advice or comment

Swanl