well, there is a difference between tuning a system for a type of music, and tuning a system for good vs bad recordings. scotty is correct, imo, when he says that, to tune for bad recordings, you simply reduce the resolution enough to conceal the flaws. (maybe that's how some folks can tolerate listening to sirius/xm outside a car.

) in this respect, you cannot have it both ways, imo - a highly resolving playback set-up may make poorly recorded software sound a bit nasty. personally, i go for as much resolution as possible. let the quality of the recordings fall where they may.
but, re: tuning for different types of music, i am firmly in the camp that if you have done your homework, you can set up a system that plays everything well. i will counterpoint off of bunnyma's post to illustrate:
If I listened to a lot of electronica, I might have beefy subs - I don't so I can have 3 smaller subs in a sort of Geddes random placement and get tight articulate bass, but not a lot of air movement or pressurization.
i want subs that will prowide a lot of air movement & pressurization - when it's there on the software. i also want tight articulate bass. yes, you can have both.
I listen to a lot of harsh/bright music, so having tubes adds some warmth and harmonics (i.e. - probably distortion, but it sounds better to me).
tubes done right will give you warmth and harmonics, but not at the expense of transparency & detail. if the "distortion" of the software leads to a more accurate presentation of the actual ewent, is it really distortion?
I like a large soundstage, but since most rock albums aren't recorded in a single acoustic space or even time -having pin point imaging isn't something I care about, so I might go with bipolar, OB, or omnidirectional speakers. With multitracking, and artificial panning, I prefer a somewhat nebulous yet broad soundstage.
i also like a large soundstage - when it's there on the recording. i also like pinpoint imaging, w/the same caveat. imaging/soundstaging is the first thing that hooked me to "hi-end" audio many years ago. so, i want a speaker that can do both. which is why i have never been too fond of bipolar/dipolar speakers, for example. i don't want that huge soundstage for
everything; sometimes it sounds way too unnatural, imo.
The music I listen too and my personal preferences mean I don't need a ton of dynamics, and prefer what sounds to me as a more accurate tone or timbre, so I prefer relatively low efficiency sealed speakers over horns.
again, there is no reason why you cannot have a ton of dynamics along with accurate tone/timbre. horns are not the only dynamic speakers. and not all horns have poor tone/timbre.
Just like I would consider the room and how I prefer to listen (not tied to the sweet spot) when considering gear, I also think it is foolish to not use your knowledge of what you listen to to guide your decisions. I too listen to all kinds of stuff, but I definitely listen to certain things far more often. So I get good sound with everything and really good sound with my favorite types of music.
regarding sweetspot, i have heard speakers excel at the sound in the "sweet spot", while sacrificing the soundstage elsewhere. some speakers, however, can sound great outside the sweet spot w/o sacrificing anything when you are in the main listening position. (much of this, however, is room dependent - depending on your room/size, you may have to make compromises here.)
There is nothing wrong with preferring accurate sound, it just isn't my main focus, and there is no reason why the pleasing sound can't be the most accurate, but "accuracy" just isn't the criteria I'm using when I judge something. Just like I'd probably prefer a Photoshopped image with beautiful color correction, compared to an accurate one that looks dull, I like my sound to be pleasing.
as i said prewiously - if the "distortion" of the software leads to a more accurate presentation of the actual ewent, is it really distortion? regarding the foto-shop analogy, if the original subject had "beautiful color", that's what i want the foto to look like; if the subject was dull, i also want that. if it's a cloudy grey day, that's what i want the foto to look like...
i think i get really good sound in my rig w/
all types of music, not yust some. (yes, i am biased - i have it set up for me!

) but, i also get less-than-really-good sound w/all types of music - if the recording sucks...

ymmv,
doug s.