Just noticed ... You can "favourite" subscribed communities to appear at the top!?

I didn't know this ... just ran into the feature just now ... maybe it's been there since the beginning.

In the list of subscribed communities ... hover the mouse over the icon of the community ... a star will appear, unfilled if not a favourite, filled if already a favourite ... and click to toggle.

All "favourite" communities will appear at the top of the list in a separate section.

Very nice!!