>>79973 (OP)
I think it kinda depends on the instinct. If it's cute and harmless, like a feline anthro licking their arms sometimes, it should be kept. If it's something that's too gross, like canine anthros sniffing eachothers butts, that can be gotten rid of lol.
Even some "harmful" behaviors I think should be kept, but only the ones that aren't all that bad. Think like foxes being very energetic and having a hard time focusing, or rabbits being easily startled. That way they feel more like imperfect character traits instead of instincts