I guess it depends on the snare and how you fit everything together, but I often boost up at 4-5k for the aggressive *crack* if indeed I want that, and cut stuff between 1-2k; I find annoying chirpy sounds round there, though I only have three snares to chose from. (one ALLEGEDLY formerly owned by Mitch Mitchell, a gift to a friend from a former drummer of a act you'd recognise ). I have a stupid analogy for snare sounds - they're like the nose of the mix. Always there, right in the middle of your face, loud and proud. Sometimes a strange nose can make a face beautiful, sometimes it can ruin an otherwise attractive person, but there's no missing it.