I dont put to much emphasis on trying to bully with a big stack in a multi, i just carry on playing hand by hand with out thinking too heavily about whether or not i should be in more pots, over raisng more, trying to dominate and dictating the dynamic of the table, you have the potential to get yourself in all sorts of trouble.
Oppoutunities will present themselfs to take advantage of the weaker players and smaller stacks but you shouldn't try and manufacture these situations base soley on your stack.
Ive noticed that one of the main problems i see inexperienced big stacks making for themselfs is over playing marginal hands, I think if you start playing hands based upon your chip stack as opposed to all the attributes that got you the stack in the first place you lose your edge.
That being said i also like to get all my chips in preflop against another big stack whilst holding an underpair without thinking twice

sigh!!