| hi jack,
if you're noting the three characteristics, it doesn't matter which object of meditation/which category of experience/which foundation of mindfulness you note. to repeat for emphasis: while doing noting practice, whichever object is being noted does not matter.
now, every single vipassana teacher of mine told me this, for years, and i simply wouldn't listen because i was too busy looking for the right object/right objects/right balance of objects/etc that would get me enlightened. it took me close to a decade to get it through my head, essentially, that whichever object is noted does not matter. when goenka instructed me to observe the impermanence (anicca) of whatever sensations came up without preference or prejudice toward any sensation, rather than understand that what he was instructing me to do was to experience the impermanence of this sensation (the one happening right now), i looked for more subtle/more interesting sensations to observe (and wondered if i was missing some magic ones). when ajahn ratt instructed me to keep my attention moving whatever should arise, i looked for ways of determining whether the right things were arising or not (and wondered how i could get the right ones to arise). when i was vascillating between the primary object i was given in the instructions on the first mahasi retreat i sat (the breath at my abdomen) and the object that my mind would naturally take as primary (blood moving through my blood vessels), u thuzana told me POINT BLANK that whichever primary object i pick does not matter because whichever object is noted does not matter ... and still i insisted on wondering what i was doing wrong and why i couldn't experience other objects (say, any mental objects, or the echo of consciousness that follows a contact) as clearly as i could the vibrations that suffused my experience. and the several times that dan ingram shouted at me and threw his hands up in frustration when i asked him various versions of the same question about which object(s) i should be noting (despite him having told me only just the day before or two days ago that whichever object is noted does not matter), i thought he was being unkind, and unnecessarily irate, and so i continued to look, (by then quite despairingly) for the right object/objects/combination of objects that, when observed in the right way, would cause path-moment.
then laying at home one day about half a year after my last retreat, i suddenly had the insight that whichever object is noted does not matter. so i went back on retreat, noted all the objects that occurred one after another, kept my attention moving, purposely kept my interviews short, reminded myself whenever i started getting caught up in the content to just keep going with this single-minded no-brains-required noting task (because it did not matter which object i was noting), and got stream-entry after 9 days.
in short: it is the noting, done right (with an appreciating of the three characteristics), that will make for successful insight practice... and nothing at all about what specific things are noted.
tarin |