To answer the question myself, I really had to consider all the angles. Generally I think of my mother as being very kind and nurturing, but I've also seen her stand up to people three times her size and threaten the neighborhood bullies with a gaze of death when I got picked on as a kid. All in all, I figure she's probably a druid since she's fairly attuned to nature and can make anything grow. She'd probably go main spec kitty DPS (she has her moments of being super sneaky) and restoration as her secondary spec. As for what race she'd be ... I see her more as a night elf but I know she'd pick tauren since the cows are so cute.
My stepmother, on the other hand, would totally go dwarf elemental shaman. Granted, she'd probably also have four level 90 alts and a bunch of battleground achievements ... She's pretty hardcore when she gets into stuff. She's told me herself that she'd get addicted if she ever started.
So, what about your mothers?