IMO...Deep throat varies, just like the cock and the man the cock is wearing
LOL
But seriously, I have met one in 17 years, I had to say
"i'm sorry, I can't even get my lips around that!"-And OMFG! it was true.
I have cultivated my own style and includes DT, but I like to run my tongue up and down, as I go, and i TEASE the hell out of them. Mix it up, add about a gallon of moisture, (you don't realize how much the sound contributes).
I try to DT, and push my limits on every technique every chance, but I like to keep it hot, and do "Amy Style", custom fit & made-never the same twice!
As for you fellas with that wicked curve-some to the side, etc...
Where theres a will theres a way, I go with the curve. As for length, I once gave a 6 hour BBBj, to a lengthy gentleman. And the gag reflex, is what made it passable. As long as it's slick,clean, and there... I am gonna slobber all over it.
One thing I have to emphasize is if you seek a bbbj, then cleanliness is next to godliness, and so is hairlessness...If I start to choke then the mileage is varied, my mouth is my deepest orifice, but YMMV...
Fyi.. I dont descriminate! I Just salivate...