I tend towards standard web fonts lately. Lucida Sans Unicode and Verdana for sans serif, Georgia and Garamond for serif fonts. For fixed width I use Lucida Console. It's not as tacky looking (IMO) as the Courier fonts.
However I just figured out how to get the fonts out of a Trillian skin and I have one called Dungeon that looks a lot like the font from the Terminator 1 credits. I really dig it.