Happiness can be classified into four main categories:
Tamasic Happiness: This is the pleasure or happiness derived from violence, excessive sleep, narcotics etc.
Rajasic Happiness: This is the pleasure or happiness derived from gratification of the five senses and the mind.
Sattvic Happiness: This is the pleasure or happiness experienced through practicing virtues such as compassion, service to others, knowledge cultivation, mind stilling etc.
Nirguna Happiness: This is the highest and rarest of happiness. This is the divine bliss of God, which is infinite in extent. A person who becomes free from material contamination and becomes united with God attains this highest state of perfect happiness.
If we can achieve the state of Nirguna Happiness in our lifetime then Life becomes complete and perfect, there is nothing more that is left to be achieved. In short this is a state of divine bliss and perfect happiness which is very rare to be achieved in a lifetime but not impossible either and can be achieved by constant practice and realizing the highest purpose of Life.