Opinion on target curves for Dirac?

I let the median slope of my system in room determine the curve.

Basically, how my room/speaker presents a slope is what I target. so it depends on the overall average of your 7.2.2 system

for my 2.4 system, has a tilt of roughly -1dB/Oct tilt from 20 to 20kHz in my space as determined by how the speakers interact with my space

I tend to do this:

• Take 9–13 measurements in a tight pattern around the primary listening position.

• Look at the "Average" measured response.

• Adjust the Dirac target nodes so they sit roughly in the middle of the measured "hair" of the high-frequency response.

• If the sound feels thin, add a 4–6dB shelf starting around 100 Hz–150 Hz and sloping down to 0dB by 400 Hz.

• Use a tool like REW (Room EQ Wizard) with a calibrated mic to verify the result with independent sweeps, looking specifically at the Step Response and Waterfall plots to ensure time-domain improvements.

TLDR, depends on what you want to achieve and if you want to remove the character of the speaker itself 

Thanks for this.  I am nowhere near this level of expertise.  It’s all fascinating.   For the Harmon 8dB curve is working best for overall action and that there is a good rumble was still plenty of clarity.  Perhaps for raw dialogue the audio advice curve would be next.   I see there’s also an NAD curve available on the website more towards two channel.  
the whole matter of measurements as in the number of measurements and the distance between themI find quite something.   interesting that dirac is not more prescriptive.   For example, one we think in a larger room more measurements would be better yet audio advice suggest a few measurements if the number listeners is fewer     Meanwhile Dirac Offers the option of adding even more measurements.   Never-ending experimentation perhaps?

I settled on Harman +4 with no treble roll off, just flat all the way out.

Wow

I was using Dirac in a 2 channel stereo system and had settled on the NAD target curve before pulling the trigger on Magic Beans True Target. At $249 it was a splurge purchase but I did find in my system it resulted in a much more neutral response, with a slightly meatier mid range and better soundstage, albeit at the cost of some of the lower frequencies. Switching between True Target and the NAD curve, the later produced a boomier, slightly more dynamic response but I definitely prefer the True Target sound. I've subsequently added a SVS SB-1000 to the system to fill out bottom end I felt I lost with True Target and I feel I've finally reached the musical plateau that I've been chasing for 40 years. Is the difference worth $249? For me, yes, but your mileage might vary and if you are happy with your current curve you might find the cash better applied elsewhere.