
Egoistic
Negative Connotation
Egoistic has a negative tone, suggesting a lack of social cooperation and empathy. 
Not Narcissistic
Although similar, 'egoistic' isn't as extreme as 'narcissistic,' which implies a deep fixation on oneself. 
Cultural Perception
In some cultures, being egoistic is seen as particularly offensive, as community is valued over the individual. 