Do you think of people who choose not to have kids as selfish and immature?

I am 20 and have known for forever that I don't want any kids. I absolutely LOVE kids, but the way I see it is that I love tigers too but I don't think I'd want to own one..... lol I'm more of the funky spoil them rotten do fun stuff aunt type. Does this make me immature, (I mean, I want to be an eye or cardiac surgeon...) or just good and oriented toward my goals? Do you think I'll have trouble finding a long term boyfriend or husband because of this? Thanks!!!!