Damage Reduction Master (3.5e Optimized Character Build)
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The build begins with the commoner from the DMG. His saves are base zero which will allow you to get the Survivor PRC from savage species. But you need to have white dragon spawn template from Dragonlance which gives you +2 to con. You'll need an 18 in con for this build the other stats are actually not as important.
Dragon Spawn Template--Dragonlance Campaign Setting Commoner--DMG Survivor--Savage Species Warrior--Arcana Unearthed
 Game Rule Components
Toughness, roll with it(Savage Species)...
Just to make him harder to hurt get a ring or cloak of resistance as soon as you can and maybe an amulet of Health for the extra hit points
Starting Ability Scores (Before Racial Adjustments): Str:11 Con:18 Dex:15 Int:10 Wis:10 Cha:9
Race Human with the whitedragon spawn template (Templates):
Starting Racial Traits: White Dragon spawn template grants +7 natural armor, Flight at twice the movement speed, natural weapons of bite and claw attacks at -5 the base attack, Breath weapon 2d6 cone of cold (reflex for half), death throes (when you die you explode in a 10 foot square d6 reflex for half), Spellcasting as a first level sorcerer, darkvision 30', +2 con and dex. +1 lvl adjustment
|1st||Whitedragon spawn 1||+0||+0||+0||+0||Toughness, roll with it||see template features|
|2nd||Commoner||+0||+0||+0||+0||Next level hello survivor.|
|3rd||Survivor||+0||+2||+2||+2||roll with it||Uncanny dodge(dex to AC)|
|5th||Survivor||+0||+3||+3||+3||uncanny dodge (can't be flanked)|
|6th||Survivor||+0||+4||+4||+4||roll with it||improved evasion|
|7th||Survivor||+0||+4||+4||+4||damage reduction 5/-|
|8th||warrior||+1||+4||+6||+4||Bonus feat: roll with it||+1 to dex|
 Other Components
At level 8 you have DR13/- and if your allowed to take flaws you get two more stacks to make the DR17/-. You should try to get a +4 cloak of resistance to get your saves as follows: Fort +9 (without resistance cloak) Ref: +8 (w/o CoR) Will: +4 (w/o CoR). Improved evasion allows you not to take damage from area effects and traps. High DR so you can take damage and ignore most of it.
 Munchkin-Size Me
Again get a cloak of Resistance and something that can enhance your reflex stat.
With 1st level sorcerer spells cast true strike before entering combat.
 Side Notes
Survivor states that you can only enter this PRC if your base saves are lower than your level. repeat warrior till tenth level. If you have a DM that allows you to take flaws get roll with it two more times. The Feat Roll with it gives you DR 2/- if you have damage reduction. It also stacks with itself. till you get the last level of survivor its useless. Get as high of a reflex you can it will help with area spells.arcana unearthed warriors can have a fast save progression in one save and a slow progression in the other two. Here you want to put it in Reflex high saves and DR but low BAB.
the only true draw back is the low BAB.
 DM Counters
Use ability drain touch attacks and something that can break the DR 13/- or dr 17/- w/ flaws. Something with a high AC and good BAB could possibly widdle down this build. Spells, spell-like abilities, and energy damage are not prevented by DR (DMG pg 291-292).