<<I'm wondering if many of us have found a "comfortable" techinque that yields nice results, and then use that across the board, or do we adjust for the music, musician and genre of music>>
i think the answer is "a little of both". i mean, your style of recording, your approach to getting sounds and tones, your baseline "defaults", your way of mixing, etc., are all going to be stylistic flavorings that you're going to bring to the table, regardless of the genre or style of music. it's what makes you be you (for better or for worse!). when someone drafts you to do the engineering or mixing, they're choosing the way that you capture and represent the magic.
and certainly an engineer worth their salt is going to realise that there's usually a "societal norm" for how certain genres are "supposed" to sound.
the truly skilled engineer will be able to apply themselves and their flavor to the applicable genre and hopefully make something that's worth listening to.
now, am i any good at all that nonsense i babbled above? probably not.
i record the way i record and i mix they way i mix, and whether any of it is "right" or not (be it technically or true to genre) has never crossed my mind. all i know is that i usually like what i come up with (although i'm always finding faults or something that could be "better"), as do those i associate with, and in the end that's all that really matters to me.
wade
PS--a good sub-question of this would be "how many of you regularly record more than a couple styles of music?" i would think that most of us tend to see work in (and focus on?) one or two semi-related styles (rock and related, hiphop and related, etc) and that's about it.