the only fonts that i recommend allowing in your systems folder is those that came with it. while adding a few might not hurt you, excess fonts will slow down your computer. they can also cause major errors with your computer and certain programs. personally i only have the fonts that are in current use active on my computer. with Suitcase all of that is taken care of. when you open up a project, all the necessary fonts for that project will be activated. i have a G4 with approximatly 800 fonts, maybe 60 of which are activated at a time.