Alright, I haven't seen very many guides about fonts or even topics about it. So heres one!
There 4 types of fonts in WoW.
ARIALN.TFF
FRIZQT__.TFF
MORPHEUS.TFF
SKURRI.TFF
ARIALN.TFF:
This font is used in textwriting. /1,/2,/3,/p,/s,/g, etc. uses this font.
Used for the number of items you have. Aka Stacking.
FRIZQT__.TFF:
This font is used in the chat bubbles and pretty much everywhere else.
Quest texts descriptions, item names, map text.
MORPHEUS.TFF:
Used for Quest Titles, AFAIK.
SKURRI.TFF
Unkown..
Picture showing fonts:
If you dont know where your font folder , go to the following:
Start > Controlpanel > Fonts
You can find custom fonts on Google,Altavista etc.
http://www.dafont.com/
http://www.fonts.com/
http://www.1001freefonts.com/
http://www.abstractfonts.com/
New:
How to make own fonts.
Find some goodlookin' font. Go into MWCS, open MPQ. Choose then locale-enGB.MPQ or locale-enUS.MPQ (Depending where you live).
I will change FRIZQT__.TFF into the Comic Sans MSstyle.
But first I need the treepath of FRIZQT__.TFF.
To do that I need to right click it, then select "Copy treepath"
Treepath: Fonts\FRIZQT__.TTF
Make a new MPQ, drag the Comic Sans MS font into MWCS, in the little box that pop ups, write Fonts\FRIZQT__.TTF. Save it.
BAM!!!
YOU ARE DONE WITH YOUR FONT CHANGE! HAVE A NICE DAY!