The worst thing about Monsters are that they have no concept of self-improvement or decency. This common personality flaw can lead Monster's to suicide in their mid 30s. It is said that Monsters usually struggle growing up from their comedic, alcoholic heydey that is their 20s as their friends (or friend) move on with their lives. As they struggle to adapt to living with their mums for 15 years, dropping out of uni and working as a recycler worker Monsters start to become increasingly realistic and realise that theirs is a life that is not worth carrying on with. Never mind.
A Monster's only real claim to fame is that they have never been beaten up by 2 girls.