Motion sensing Max/MSP Jitter experiences...

It's generally the case that you'll have much better
luck asking for examples of specific tasks [rather
than asking someone to hand over an entire project
they've spent a gazillion hours on], and even
better luck than that if it's clear that you're working on
those tasks yourself [and nothing says, "I'm working
on this stuff and don't mind sharing" like posting a
working subunit and asking for advice or feedback].
This is generally true on these forums, and the larger
the thing you ask for, the more true it tends to be. :-)

Barring that, a verbal sketch may serve you well - you
may find that any number of posters are quite willing
to share their own experiences with a given technique
as prose - e.g, "I'm thinking of using jit.3m to derive some
basic min/mean/max information about a slice of an
incoming matrix and using that as control information.
Will I get a broader or more varied and useful range
of data by doing analysis on an individual plane, working
in black and white, or RGB?" It's quite likely you'll get some
sort of response of the nature "I tried that, but found that
it's not so much which plane or planes I analyzed that
made the difference as it was a case of smoothing the
data...." If that seems like a rather specific example, it
is. A real one of my own.