Fletch,
You got it perfectly stated---personal preference style and feel.
Just for info, nothing more- I did put my GPR on the TE300 for a few rides than I pulled it again. I liked it on my TXC450 big time (always at super low settings), but on my 310s I did not like the damper (such a great chassis-125/250/310 semi perimeter chassis).
The Kato based TR300 2T is abit twitchy and Im still getting dialed in to feel the 2T, but I it just seemed to kill the light feel of the bike. However as we all know from experience chassis adjustments can really make big time changes. I have my steering head bearings like Norm/Rich said and from what I understand that's what many of the Euro enduro guys do- run tight bearings. As well as 1 ring projected forks and short rear sag to weight the front more---I know that's little twitchy, but Ive got her balanced for big me, as I tend to not crowd the tank and sit back more. So whats my point? personal preference set up for ride position feel and control. And our ammie level racer results show we are doing the correct things for us as individuals.
PS like you I have my ritual- Flag type handguards (OEM type in this case), Answer/Pro Taper pillow top grips, mousses, maybe Flexxbars again, I like stock 2014 seat, EE Rad guards (always drilled). sharpened footpegs, brake snake, Plastic (flexible) skid plate, spin balance fr and rear wheels, Tires....I always used FIM type enduro tires but I am slowly changing that ritual (will try an AT81 in the rear with my fat GT216AA up front).
PS Also for personal feel, the fat 216AA does settle the front more as well and with that mousse dead hit feel the front is consistent and feels fairly well planted.