Not all women feel this way, I am one of the lucky ones and menopause has not been too bad, I don't feel that much different from before.
What does effect me is just life and its ups and downs and I had them before menopause. My parents dying was a major change for me and turned me into a grownup and aware of my mortality.
I can still be happy and enthusiastic, still be down and anxious, still laugh and cry, being post menopause is much more preferable to the alternative, and I still think this world is a beautiful place (pity about some of the cruel and inhumane humans)
I think the combined HRT can cause the effect of flatness and dampened down sex drive, I remember that's the way the BC pill made me feel, once again advantages and disadvantages.
When I was in my thirties my mother gave me a book about hormones and menopause which started me on the path of finding out all I could about what would happen to my body, I have never found that women would not talk about it and worked at a Well Woman Centre where I gave advice about hormones and menopause and women were very eager to talk about menopause.
A feeling of flatness is a sign that all is not well
http://changingtime.wordpress.com/2009/05/03/if-you-are-feeling-emotionally-flat-be-silent-and-listen/ Feeling flat now and then though I think is normal, just part of the human condition.