As close as I can let it get and it remain at ease and not spooked. If I can get it under 25 thats great.
I will take 40 without concern for I practice that range very regularly, but not my top choice for a shot.

i like to stay less than thirty yards
more than that my groups wander

40yds and under....

I like anything 30 and in. I can do 35-40 but most of the time I find that if you have an opportunity to shoot them at 40 chances are you will at 30 as well. Patience,.... let him come in.

Comfort zone is 60 and under not saying i would shoot that far but i could. Anything under 40 is ideal.

Depends on the the stand I am hunting... With that said I got the green light out to 60 yards!!

My comfort zone is when i put my site on the animal and all pins are in the kill zone, Thats in a perfect world, 30 and under. I shot a buck at 4 yds when i was 15yrs old and believe it or not almost missed ( I was on the ground) and shakin a bit

I'd also have to say 25 yds. I practice out to 60 but like to get em in close. But sometimes they get in too close and have to wait til they pass. I would much prefer 15 - 20 yds and be at full draw when they get there and offer me a good shot angle.

30 yards and under for me .

Like a lot of others said, there are a lot of variables, but I prefer 10-25 yards, but I will go out to 35 if its clear.