I hear you on riding passengers. I'm a strong rider, but if the passenger swings head and shoulders to look at something it throws the whole center of gravity off and I'm left trying to play catch-up on the balance thingy...kind of important to have on two wheels at slow speed.
...and another thing -
WATCH OUT FOR LEFT TURNERS !!!
You know, the clueless drivers that are doing the 100 yard stare right through you...as they turn left in front of you from a side street...
or they turn left in front of you from oncoming lanes.
They're like a bunch of Zombie drivers or something..brains, brains...they're missing their brains ! Worse yet, they're after mine