Honestly i should probably make a tutorial that describes some of my techniques/preferences

But a few details that make for drawing a good titfuck pic FOR ME are:

-coverage. Ideally the cleavage should be actually covering enough to be used as something to get the girl off. Its fun to do stuff with significantly longer/larger cock sizes but imho full smotherage or cockhead barely poking out of the cleave is ideal. Short queens stay winning.

-breasts are not actually round/orb shaped. They are actually a shockingly complex and malleable shape that has multiple anchor points on the body [shoulders/armpit, lower back, sternum]. Additionally, they change shape heavy when force is acted upon them. Mass is pushed from one spot to another. I think work that demonstrates this tends to really look good

-sag is good. Sag is your friend. Do not be afraid of breast sag, it it God's greatest blessing