I'm self-centred. I don't like having to live my life around others needs. Making myself happy is my primary goal in life. I live for me. I view my purpose in this life as being able to cater to my every need. I want to be able pursue whatever I like, whenever I like, however I like with no restrictions. To be a parent means you need to be selfless for decades. That sounds like pure hell!
I'm not cold or evil, and people have always come to me for advice/support and find me dependable, but I know if I had to be a parent, I'd resent my kids so much, and no child deserves a parent like that.