There are some older threads that address it, but I have a more specific question...

You can trim with one guard and you can trim with a shorter/longer guard. Abything between bush and bald works I imagine. Different strokes for different folks depending on your hair strength, count, curliness, etc

1.  There is a set length for beards, though:  exactly 0.0 mm.  No, I do not conform to that, by several cm, but that is the set length in our peculiar culture.  
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2.  "Anything between bush and bald" unfortunately seems to approve of that most painfully annoying length, stubble.  I never want to encounter stubble on a lady (any part of her), and I don't ever take stubble to a lady (any part of me).  
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3.  I hope folks reading your suggestion do not follow it as written.  People would get hurt!

There's no suggestion there. Just my personal take on it as someone who is fairly hairy on the bottom part of my body and someone who doesn't wax/shave and just trims. I'm just saying how I approach it.  

I think the only place you should have stubble is on the face (and that can cause irritation too, but I guess some chicks like a bit of beard on guys for esthetics.)  But for pubes and hair on balls, should either be shaved fresh or more than a quarter to half inch long at the least to avoid the scrub brush effect.

what are the best ways to remove all the hair from your balls?

I prefer a man who is totally shaved down around his balls & dick.  Less hair in my mouth.

Thought about putting an shaved arrow pointing down, but I lack the skills for such an endeavor.  Thought about Nair, a laser, or even a razor, but didn't want the area to rash up to look like some sort of super STD.  As a result, I just use a regular clipper #1 setting to keep it neat.  It DOES make your dick look bigger, like some sort of optical illusion.  HA!  For those of you that manscape, do you also hit the backside?  I find it a bit difficult without help.  

I wax. My chest, cock, balls, back and ass.

I shave my balls with a regular razor. I take my time and usually it's a process that takes a few days since I always discover spots I missed once I get out of the shower.

I’ve been receiving Brazilian waxes for many years. When hair returns just before my next wax, there isn’t as much hair compared to when I began several years ago. I enjoy BLS just after a fresh Brazilian.

stubble, which can leave a rash if you are grinding intensely.  Either shave less than two hours before the session with a new blade if possible, or let it go for four days since the last shaving.  There won't be any stubble, and the hairs will be short so as not to interfere with the enjoyment for her.  For the guys, it's a different matter.  Anything less than shaved smooth everyday reduces both the sensation and enjoyment.  I prefer to shave as close to the session time as practical.  Visible hair is long enough to harbor bacteria.  If you are freshly shaved, you are more likely to get a BBBJ as soon as your pants are around your ankles rather than after the shower.  

Absolutely!! Once every 5 week.

My hair grows pretty fast, so I figure in a week it won't be smooth anymore and in about two weeks it will require a trim.  

I don’t hobby as often as I once did. 4-5 weeks works for me.

Some people like laser hair removal; laser depillation.
It's supposed to be permanent.
http://www.webmd.com/beauty/laser-hair-removal

Laset hair removal depends on contrast:  Your hairs must be significantly darker than your skin for it to work.  
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I can't use it because I waited too long; my skin is still nice and pink, but my hair is mostly white.

A fun twist on this subject is to have my girlfriend, Barbara, do the shaving. She absolutely loves, so to speak, "having me by the balls."  

Straight razor or Safety razor? Depends on how much you trust your Barber-a!

Quite interesting!  

Get sugared.   Similar to waxing though lasts a bit longer and everything is SMOOTH!!!

I get waxed. Started in 2017 and will continue.  It’s the easiest and most convenient method for me. I go 10 weeks between waxes, my hair doesn’t come in thick at all.

Looks weird just doing the pubic area.  Then the hips, legs, stomach, back, armpits ... Yikes!  Everything under the neck is hairless.  But, you're smooth and it feels good for a couple of days!!!  LOL!  

As a provider.......I prefer a man who shaves his balls and dick area completely because I do not like hair in my mouth. And it's cleaner.