"Enjoy being alive" is not something most people in the modern world are capable of doing... Being in the now and being without false desires takes quite a bit of awareness, self-reflection and meditation.

Most people live very shallow, materialistic, egotistical, narcissistic lives. They also smile to seem happy, friendly, and desirable. It does not represent the real person inside.

Take what you have written: it's judgmental, borderline racist, and narcissistic.

There is little chance that you are truly enjoying life, except in the typical / selfish ways (I'm not that much different).

No one can "suck all the life out of a room." If their behavior affects you in such a way, it is only so because you require / desire perceived positivity from the rest of the world. It's like a drug / an opiate that keeps you from screaming inside.