Are you talking about from the woman's perspective or the man's?
Older men tend to be more financially stable and successful. They are more sure of themselves and more confident. Men get better with age, at least through their 40's (I don't know past that yet).
Women past 30 go downhill fast. They get bitchy and demanding. They tend to be overweight and start sagging. That is not to say there are not incredible women over 30, there most certainly is. But they are ALWAYS happily married. Any woman that age who is single is someone's reject.