Ha, I'll throw one more thing out there, based on my massively large sample size of 2 trucks.
I have a 2000 that's well documented on here with a "harsh" ride over the small stuff. Started with a full OME setup from SLEE from the PO (Pint's truck, lift probably installed 7-ish years ago). Diff drop, TJM T3 bumper, step-sliders, no extra weight = very harsh ride. Installed used OEM t-bars and springs, plus coil spacer = a little better. OEM shocks = a little better. Every combination of tire and wheel, not much difference (currently on second set of 295/75/16 Nitto TG's). Original Fox 2.0's = massive wallow at highway speeds, almost dangerous (they did a valve change later on that supposedly corrected this?). New rear control arms, OEM upper and SLEE lower = no change. New OEM shocks (blew front one) = same old, same old. OME 865's reinstalled back in the rear, less wallow (think the OEM springs had had it). Different rakes, alignments, tire pressures, etc. etc. This thing STILL transmits all the small bumps in the road right on through. Currently has ~215K on the clock.
Compare to my '04 which I've had for ~18 months with ~180K on it. No aftermarket bumpers or sliders (the T3 doesn't weigh that much anyway), no diff drop. I immediately added 30mm spacer to the OEM springs, and cranked t-bars to match. PO had some version (can't remember now) of the OME shocks on it (yellow and light blue). 18" wheels with 285/65/18 Nitto TG, E-rated, which by all accounts should be a harsh riding tire. This thing is just TIGHT! Small bumps, large bumps, cracks, rocks, whatever, it just rides like it just rolled off the showroom floor. Plush on the little stuff, and very, very acceptable on the big stuff. I wish I could get the 2000 to ride like this.
The only thing I haven't changed on the '00 is the front upper and lower control arms and bushings, and the motor and transmission mounts, or body mounts (but the body mounts are tight). Other than that, I'm resigned to the fact that there is "something" I've yet to discover that makes some trucks ride harsher than others, and some trucks at 180K ride like factory new.
(if I could get my wife to stop putting $18 worth of change in the little cup by the shifter it probably wouldn't rattle so much

)