They want to win they stopped thinking about anything except gambling. Addicts do not remember the feeling of playing for fun. They started by playing for fun using little money. One day they started playing for money and stopped having fun. Addicts do not get excited they lost enjoyment when addiction took over their life.
It depends on how he's gambling. If the gambler's excited because he's chasing the losses it's a different feeling. If he's trying to get losses back he's going to feel different. If he's winning but doesn't stop he's going to feel different.
It is correct that things are different based on the gamblerand how the gambler is gambling. The gambler usually do not feel better if he is in loss in gambling but those who loses small amount of loss for the enjoyment and never fell guilty for that might be different who wises to be a winer and the main purpose of those is only being a winer from gambling.