I have released a new version of the Paper theme (v1.0.3) today to display category list on the archive page – this can be disabled via plug-in settings. The theme now also supports Reply by email and Conversation on M.b plug-ins by @sod. So if any of the plug-in is already installed, the appropriate link will be displayed under the posts. The upgrade also brings support to include Buy Me a Coffee profile in the social icons list.
I appreciate all the feedback I have received until now. With all the improvements, Paper has become my default theme for my blog (what you see here).