Thanks for the help David and Mirhale :) I think this one will do http://www.digitaltutors.com/tutorial/1683-Creating-Stylized-Textures-for-Low-Poly-Models-in-Photoshop
I wouldnt call it TF2, but consider firefall for stylized, clean scifi art: http://www.firefallthegame.com/ Also not tf2, but gorgeous: http://www.wildstar-online.com/en/
Thats looking good to me, its depends where you will use them on. For example: in a realistic propose will not fit, but in a stylized scene, that will fits very well :)
Dude this is amazing!!! Cant wait to see this finished. Curious to see how you tackle the hair textures. will you be doing more realistic hair or stylized?