o what are the qualities you look for in an outstanding handjob?  There are as many different ways of doing / getting a handjob as there are people, I suppose, but what do you look for?

being able to read a guy's state of intensity is very important cuz it's great when a girl knows when to slow it down a bit and when to start speeding things up milking it like her life depended on it
in order to help reach the apex of Mount Gasm.

Really enjoying it and being present, in the moment and paying attention to how the man wants to be touched, what brings him pleasure and what doesn't.

She lays back on the bed with her knees bend and legs spread. She applies either a lot of spit or oil to her freshly shaven kitty just above her clit and to her hand. I assume the position and lay my manhood on top of her. She places her hand on top of my manhood and I slowly start the motion, balls gently slapping up against her lips and clit. I lower myself onto her to suck on her wonderfully firm perky breasts, then on up to kiss her puffy moist lips. I raise back up and the pace quickens. Now I'm pounding her for all I'm worth, balls slapping up against those puffy lips and her swollen clit, closing my eyes, imagining I'm having BBFS with this beautiful sexual being until I explode all over her belly.

Uncut men don't necessarily need lube or spit.  Just saying'.

and she should be naked and allowing my hands to wander where they may.

She should alternate her gaze between my cock and my eyes, and lick her lips once in a while.

Lots of oil or lube, and a good firm attention to the head and slow even strokes, and light fondling of the gonads.

If she bends over and lets her nipples rub against the tip, so much the better.

A good HJ is one of this hobby's underrated pleasures.

mostly really tuning into the responses you are getting and letting his or her responses guide you instead of relying on "technique" -  everyone is unique and every encounter is different....  

I show this video on my Iphone to the massage girls I visit and they are more than happy to massage me the same way.

It's not my hand?

HJ are not covered unless that is the provider's option  All that can be discussed openly prior to booking the party.  If the lady wants it covered and the client doesn't he has the option to speak to another lady.

The lady looks at the video while massaging.

the lady in the video is not a provider as far as I know.

The best hand job is when she needs two hands to hold on while she bounces up and down on my cock (aka...not a hand job at all).

a key for me is the build-up.
20 minutes of light grazing, soft touch, then massaging the boys, then lightly up the shaft, then well-oiled, slow strokes, with not too much pressure on the tip - as I get extremely sensitive there.
This lady I go to is a master.

I like the kind where she substitutes her mouth for the hand. It's that easy!

When I started at the Kit Kat under a different owner, I was told by one staff member that it was illegal and disgusting for a working lady to give a bareback handjob so I read the State Health Regulations governing us and it says only that a condom must be used for intercourse and mouth to genital.  They told us we had to use saran wrap if a man went down on us.