I Brought My Own Cool-aid

Which generally means that you have your own perspective or viewpoint on a particular topic. This phrase originates from the idea of being independent and not needing to conform to the views of others, similar to bringing your own drink instead of partaking in a shared one.

"I’m the one that’s got to die when it’s time for me to die, so let me live my life the way I want to."
– Jimi Hendrix .