my blogger and i

well, sorry bout that... blogger and i have been having some interpersonal difficulties. fortunately, they seem to be resolved at the moment.

my question for you tonight is this: why do we do what we do... in short: what makes us humans tick? and then think on a smaller scale: what makes you tick?
it strikes me, as i sit here, dying of sleepiness... that the immediate reply to the above question is 'well, it's important to...." mr. x - or myself, or whoever... but then, why is it important to that person?
for example, i'm currently studying biochemistry... it's important to me yes... actually, i'm loving my classes - but what makes it important to me? (by the way, i DO know why it's important.. my question is general. i.e. this is not a life issue for me!)
another example... this one completely different... you know that irritating thing person y does? why do they do it? why is it that my brother taught my sister to say "ahhh" after she takes a sip of water?
you see, while humans are creatures of habit (hence this blog)... we still have quite a bit of control over what we do.. therefore, i submit that we allow certain actions to become subconcious, but that we do, in reality, have quite a bit of control.
anyway, i've lost my train of thought... and well, since my writing is more of a junkyard of thought, i doubt that any of you understood what i'm trying to get at regardless, so meh.

take care all