More on the encouraging trend of getting older - emotional regulation improves with age - you're less likely to be neurotic, more likely to recognize happiness (teens are particularly bad at this), and have strong cognitive control over fear.
The ages studied were from age 12 to 79. Interesting tidbits turn up here and there - young adults and middle aged folks had the strongest subcortical responses to fearful faces, and the period of 20-29 had the strongest responses to both happiness and fear.
It's good to remember that emotional recognition and cognitive control over emotions vary depending on what stage of life we're in. And it's good to hear that over-all trend for growing older is good!
Improved Emotional Stability with Age pdf