There is a particular rush that addictive can give. Pretty much like any cases of substance or alcohol abuse. It can boost one's feeling of morale, thrill and excitement.
This feelings though are pretty much the root of all these. Each form are intended to be a form of escape or a diversion to face the actual emotions we are trying to suppress.
Yes, there is a something that i can feel everytime i gambled. It boost my energy ang giving me a great mood. Gambling is a source of happiness for me, yes im addicted to gambling but i dont give all of my money to it , i am staying in my focus in the game. I believe thay gambling is good for our brain. It helps us to train ou mind in our game.