If you're wondering what I put on the TXPERS textures
Here's a list.

TXPERS1 - Angry Video Game Nerd /* Cinemassacre Productions */
TXPERS2 - Age of Mythology /*  Ensemble Studios  */
TXPERS3 - Strong Bad from homestarrunner.com /* The Brothers Chaps */
TXPERS4 - Sergeant Schultz from Hogans Heroes
TXPERS5 - Flandre Scarlet from Touhou 6 /* ZUN */
TXPERS6 - Jim Raynor from Starcraft 2 /* Blizzard Entertainment */
TXPERS7 - Orc from Warcraft 3 /* Blizzard Entertainment */
TXPERS8 - Jim Carrey as The Mask /* Dark Horse Entertainment */
TXPERS9 - Blue Shaman from Populous: The Beginning /* Bullfrog Productions*/
TXPERS10 - Age of Empires 2  /*  Ensemble Studios  */
TXPERS11 - Richard The Lionheart from Stronghold Crusader /* Firefly Studios */
TXPERS12 - Pennywise from Stephen Kings IT
TXPERS13 - System of a Down
TXPERS14 - Heavy Weapons Guy from Team Fortress 2 /* Valve Corporation */
TXPERS15 - Jak from Jak and Daxter /* Naughty Dog, Inc. */
TXPERS16 - Ash Williams  /* Evil Dead */
TXPERS17 - Postal Dude /* Postal */
TXPERS18 - Dalek from Doctor Who
TXPERS19 - Duke Nukem /* 3D Realms */
TXPERS20 - Serious Sam /* Croteam */

In the bonus maps:

VXPERS1 - Dr. Steel
VXPERS2 - "Weird Al" Yankovic
VXPERS3 - Andrew Sega
VXPERS4 - Mister Torgue /* Borderlands 2 */
VXPERS5 - Doctor Nefarious /* Insomniac Games */
VXPERS6 - Beavis and Butt-head
VXPERS7 - Eddie Riggs /* Brutal Legend */
VXPERS8 - Cyriak Harris
VXPERS9 - Necromancer /*Diablo 2*/
VXPERS10 - Dr. Weird from ATHF 
VXPERS11 - Coach Oleander from psychonauts /*Double Fine*/