If somebody says he or she is an existentialist, what does this mean in essence? I looked at the Wikipedia article for Existentialism; yet I'm still unsure as to what it means in a nutshell.

When watching this speech by the Atari founder, he says (at 09:19):

If you're a true existentialist [...] you want to have an interesting life.

Thus, if someone says he or she is an existentialist, in the way he did, what might this mean in essence? I looked at the Wikipedia article for Existentialism; yet I'm still unsure as to what it means in a nutshell if stated in a colloquial way.

If somebody says he or she is an existentialist, what does this mean in essence? I looked at the Wikipedia article for Existentialism; yet I'm still unsure as to what it means in a nutshell.

If somebody says he or she is an existentialist, what does this mean in essence? I looked at the Wikipedia article for Existentialism; yet I'm still unsure as to what it means in a nutshell.