Favorite 3.5 level 20 builds? Include race, try to keep splatbooks to a minimum, and for the love of Pelor, keep the Weeaboo Fightan Magics out of this. (If you do use splatbooks, list 'em)

Mine would either be this:
Tiefling Ranger 6/ Fighter 2/ Rogue 4/ Assassin 4/ Dervish 4
(Used Complete Warrior)

It's fun to play as, decent skill selection, good saves, can hold its own in a fight.

Or:
Elf (any kind, usually Wood) Ranger 8/ Rogue 2/ Bard 2/ Fighter 2/ Barbarian 3/ Horizon Walker 3

Decent skill selection, with the Horizon Walker you can become immune to fatigue, so you don't get fatigued after you rage, stealthy, great in combat.