When to play Hearthstone

I'm finding that I can't play Hearthstone when there are any distractions.  I need to think and concentrate on it. Which means late night is basically the only time I can do it.  It's interesting that Hearthstone is in the genre of card games like Magic: the Gathering.  All the physical versions of these games require that at least two people get together.  So, a minimum level of sociality.  Hearthstone can be played by complete loners (and probably is a lot).