The logic, as I see it is like this:
 
When you first start Sonar, no preset is loaded.
When you load one or more presets, the LAST preset loaded is invoked when you close one project and open another
 

First of all, it turns out my earlier thought was never going to work, because until I had midi data entered it wouldn't even let me at the quantize settings, so please forget my earlier idea.
 
Second of all, I just launched Sonar Platinum, and recorded some random drum hits on a midi track using Battery 3 and one of my midi controllers - just wiping across a bunch of keys to get midi data.
 
I THEN was able to get to the Quantize dialog box, and once there I noticed something I had not noticed in the past.  Just to the right of that text box in the upper part of the Quantize dialog box, there is an icon for doing a Save.  When I hit F1 to get the handy dandy context-sensitive help, it informed me I could actually save any number of presets with commonly used settings.
 
Sooooooo, that seems to me to be good news for you, as you can create and recall your frequently used settings and that to me looks like it addresses this problem in a pretty nifty way.
 
I will also add that they have indeed added a whole bunch of context-sensitive help documentation throughout this latest release, that makes it easy to see what choices there are or are not as you move to different areas of the program, and if it works throughout as really helpfully as it did for me here, this will be VERY helpful to lots of folks.
 
I urge you to try creating a few quantize presets for your settings, and see if that takes care of this issue for you.
 
Bob Bone
 

So, if you wish the default preset to be some particular one, and it makes you actually load a preset instead, why not simply create a preset with the desired default values, and name it in a way where it is the very first one in whatever list of presets comes up?
 
Would that satisfy your needs?
 
Bob Bone
 

Pretty sure most dialogs like Quantize have a default setting stored in the registry. I have never bothered with setting them though.

1) load or start a sonar project
2) open piano roll view
3) select some notes
4) open quantize popup (I have this mapped to F5)
5) which of your saved presets is loaded by default?  For me, no preset is loaded by default.
6) select a preset
7) apply the quantization
8) save the project
9) close sonar
 
10) open sonar
11) load the project
12) open the piano roll view
13) select some notes
14) open quantize popup
15) which of your saved presets is loaded by default? For me, no preset is loaded by default.
 
Are you getting the same behavior?

 
In other words, does Sonar forget what preset you had loaded once you close the program?  So, each time you restart Sonar, you have to select your favorite quantize preset again?
 

scook
Pretty sure most dialogs like Quantize have a default setting stored in the registry. I have never bothered with setting them though.

It looks like I have the couple of presets I just created for quantize settings groups stored in the Registry at:
 
Computer\HKEY_CURRENT_USER\Software\Cakewalk Music Software\SONAR\Platinum\Presets\{23E18F60-FCEC-11CF-953F-00AA00A76449}
 
And then each of my presets is contained as a single entry by my preset name and then its associated data values.
 
If I wanted to have a default group of quantize settings, I would simply name it so it showed up first, since it does display the list alphabetically.  I also checked in the registry, and it actually stores them alphabetically there as well, not that it matters there - just so the displayed list is alphabetized.
 
So, when I load that project, or any project, and I want to have that one particular group of quantize settings get applied, it currently does not load any default, HOWEVER I merely have to click on that arrow to the right of the preset select box and literally click on the first one in the list, and I am good to go.
 
I personally don't see having to do that to apply a common set of quantize parameter values as ANY sort of roadblock to my work flow.  It LITERALLY takes about 1 SECOND to do this.
 
I have much more to deal with in MY life than the minuscule amount of organizational effort needed to come up with a name for my wonder list of default quantize parameters that sorts alphabetically first in a displayed list of such presets, and the 1 second it takes to select that 1st preset from the displayed list.
 
But that's just me, 
 
Bob Bone
 

And any time I load almost any synth into a project, I have to load up some preset prior to it playing any sound.  There are some that have some default sound loaded up, but I do not recall ever having any access to control what default sound that would be.
 
Sometimes, things aren't always such a big deal after all - to me.
 
Bob Bone
 
 

Before doing your final save on a project, call up the quantization preset you want. Then whatever you open next, old project or new, will default to that preset. IOW, SONAR remembers what you used last.

Before doing your final save on a project, call up the quantization preset you want. Then whatever you open next, old project or new, will default to that preset. IOW, SONAR remembers what you used last.

This does not work for me. 
 
Whenever I restart Sonar, and then open the Quantize popup, the drop-down at the top of the Quantize popup always starts off empty.  I then have to manually select one of the presets I have saved.

Sorry, I missed the part where you said you re-started SONAR. Of course as soon as you close SONAR, it will forget anything that doesn't persist.
 
I'm surprised anyone would find this an onerous limitation, but to each his own. If you're really that freaked out about it, put a MIDI track in your normal template, insert the Quantize MFX, and set the parameters to whatever you want. Save the template. Then when you open your template, not only will you have the quantization you want, you'll have a MIDI track open and ready to record. If you want to record another MIDI track, then just ctrl+drag the MFX into that track.