Your Preference: Resolution or Fullness?

Gotta do both pretty well and sound good overall. Lots of good affordable gear is capable of both.

The main keys to both together is often getting a good integration with room acoustics and an amp that is 100% up to the task of driving the speakers to the max. Power needed to do this with many modern speaker designs, especially at higher volume levels and with many modern "louder" recordings in particular is often underestimated.

After that is done well, the rest is more or less "fine tuning" the sound. Everything else will have an impact in all ways and no two combos are likely to sound exactly the same, so individual preferences come into play to a large extent, assuming gear is good quality in general.

"Some might argue that the latter (reflected energy) ends up obscuring the former (high resolution direct signal), but IME, that's highly room and set-up dependent."

I'm in the opposite camp.

Sound (including detail) is a 4-d (including time dimension) phenomenon, not 3 or 2.

Most recordings have spatial cues captured in the sound. I view being able to hear those properly reconstructed (in 4 dimensions) as part of being able to hear the detail effectively. Soundstage and imaging are the things most commonly cited that enable this.

That cannot happen without reflected sound. Try to get a "soundstage" and imaging from speakers set up outdoors for proof. OR from most conventional head or ear phones.

Delivering the sonic spatial cues present as best as possible is ALL about room and setup (also listening position and associated timing between direct and reflected sound) as Marty indicated. This is the case with all speakers, directional, bi, omni, whatever. How to accomplish best with each will vary.

The key is to get the timing of the reflected sound correct correct so that they are delivered accurately. Not addressing this along with all the other aspects of setup is a common problem. Detail will be masked otherwise, more with some recording than others, but to some extent with most all.

Regarding dimensionality and detail, go see a modern visually detailed/exciting movie in both hi res 2-d and 3-d. WHich enables you to focus in on the details as needed better? Same applies to recorded sound.

no fat bloated fullness for me.

My term for it is "meat on the bones".

But its not fat or bloated and does not obscure the mids.

My experience in general is similar to Jmcgrogan2's.

My longest listening sessions tend to be with my speakers
that sound fuller. I am able to enjoy the music more for
longer periods of time.

Listening to/for "resolution" is harder work
mentally and requires more "attention to detail"
(no pun intended) and focus. It has its own rewards but I
find I'm ready to take a
break sooner. Fullness provides easy musical satisfaction to
just soak in and is
conducive to a more relaxed experience just enjoying the
music. The detail becomes a supplemental thing to enjoy
either more or less as desired as the music unfolds.