In my experience it's all wonderful with girls until about 16. Around that time boys kind of calm down and start focusing their testosterone. Girls get a little challenging especially for fathers.

Older fatherhood isn't all bad: testosterone rates drop about 1% per year as men age making them less reactive and more patient and a professionally established middle-aged man is likely to have more time and money to devote to his kids than a twenty-something who's just getting started.