I commented to my aunt (who is now 91) that she snored like her mother, my grandmother, and she, hating her mother, instantly reacted that she would have to change that. What we like/don't like and how we feel about our mothers is mostly in our heads? That she has the same mental illness does not mean your actions will automatically become the same, there is no predestination to become "like" another, some genes for literal attributes (my husband and I are both good navigators, for example, as our fathers were; I have no trouble with directions, maps, getting lost, etc.); I like history an my father and grandmother's aunt did too; she was the first women history professor in the US. I'm "too" honest (have trouble lying and being believed) and my ancestors in all directions back 150+ years are lawyers, justices of the peace, Methodist ministers, sheriffs of the county, supreme court justices, etc. My stepmother use to threaten me with "The Truth if it kills you!" (and she would have :-) and I was in my late 20's when I learned from her that she actually got that phrase from my father's mother whose father was county sheriff and I found his 1940 obituary notice and it praised his honesty; gee, wonder where I got that attribute? :-)

People are made up of all sorts of attributes though, good and bad and how they are applied or if they are chosen to be applied depends on the individual. Unlike other animals we don't have to do things by instinct/rote, we can overrule our head (or heart) at any time.

Even your mother's mental illness, maybe she's 37% that illness, that means she's 63% other things and you may be 22% but it's not the same as her first 22%; you are a whole different generation with whole different problems/perspective; your children are not you (so can't become you); one cannot step into the same river twice?