In Commander, I've always said that counterspells should be primarily protective. Use them to protect your boardstate or stop combos. Using counterspells the same way as removal is a bad idea. I still hold this to be true.
However, in the past I've also said that countering non-creature spells is more important than countering creature spells. This is because most targeted removal are instants and most boardwipes are sorceries, so with the focus on protecting your gameplan, you do want stuff like
Swan Song and
Stubborn Denial.
But now we're seeing a lot of creatures like
Dockside Extortionist,
Thassa's Oracle, and
Massacre Girl. These things demand an immediate answer, and removal won't cut it. You need something that can counter creature spells.
Have you come across situations where you wanted to counter a creature but your spell said "counter target non-creature"? Do you think it's still true that countering non-creature spells is more important than countering creature spells? And which counterspells do you use that also affect creatures?