Because you are happy and you are fulfilling your dreams.
"Success" to me looks like a well-respected and decently-paid position in a humanitarian career, a happy romantic relationship, a loving family, a comfortable home, exciting travel plans, and a few fluffball kitties.
My face on a magazine cover... well, it might be temporarily pleasing to be that famous, but I think about the lasting impact of that, and I'm not sure it would have an overwhelmingly positive moment-to-moment impact on my life. I don't desire a career in entertainment, so I wouldn't want to go that direction. I mean, if I make some Nobel-prize-worthy discovery, then by all means, plaster my face on magazines and I will be ecstatic. But I can't see desiring fame as a goal unto itself.