Breaking Mommy Dearest - Chipping at the Walls

"...Yet she her feet still hit the ground every morning.  She kept her head up.  Her faith remained strong, when most would have thrown their hands up in despair and given up.  If she did any of that, my brother never knew or witnessed any of it."
This brings me to the difficulty I have in getting my mother to open up about what's going on inside her head at any given time and why I have such a hard opening up to her.  This past weekend I had the opportunity to have a few heart-to-hearts with one of my aunts during some breaks in the craziness that is Dewey Beach during Memorial Day Weekend.  I can talk about anything and everything with my aunt.  She's the youngest of my mother's siblings (her and my mother are 10+ years apart,) and helps give me insight as to why Ma is the way she is.  Although sometimes, both of us can end up at loss.
I've come to the conclusion that it's because of the ripple effect, as is common with just about every family.  My aunt had her two older sisters to discuss "sensitive" stuff with; she didn't go to my grandmother and I can only assume that my aunts are the ones I go to when I'm in the same situation because I don't have any older sisters.  Ma has continued much in the same fashion as her own mother as far as keeping her feelings to herself and not really wanting to know much about her own kids'.  Every time I try to share what's going on in my head, Ma can be downright insufferable, sometimes to the point of attacking me verbally for feeling the way I do about particular things.
I wish it weren't like this.  I've been trying to focus on the pleasure the little things in life give me (like a good book, a song that gives me goosebumps, sweet things Philip does for me or says to me.)  I wish I could share these things with my mother and get an equally excited response from her.  But I can't because, let's face it - I don't think she ever really cares.
I do want to chip away at her tough exterior but I get exhausted just thinking about the energy it would require.  I don't want to break her completely, I just want to see that she is capable of bending.  It wouldn't make just my life a little easier, but plenty of others as well.