I keep one or 2 small pike cause my wife likes to eat them
but large ones no , I don't keep any big fish to eat, I don't think they taste as good as small ones
the big ones have has many more years to acquire toxics in them, so small ones are safer
plus big fish are more likely to breed big fish
as for muskie, small ones are under the slot size so you can only keep big ones, but they taste like crap so unless you are getting it mounted I see no reason to keep one, but that's just me