"I'll be your man"

It may have been statistically proven, but it does seem to, for once, actually make a stereotype true. Namely that women like to feel they have a strong, dependable, reliable, independant, mature, self-guided man in their lives.
Rather strange, since men in their twenties have been known, again possibly statistically, to be slower to mature than women.
Many friends sigh when they see a male movie star on TV and say: "Why can't my boyfriend be like him? Why can't he simply grow up?"
What do guys say? I'm curious. Do women seem too mature? Too demanding? Too difficult?
So listen to James Blunt's "I'll be your man". To my female hormonal ears, I swoon. To a man? I'd like to know.