This one may seem like a no-brainer, but believe it or not, there are plenty of users who don't even know this option is there. Much like myself, many BlackBerry users just stick with the default settings on the device like screen birghtness, trackpad sensitivity, wallpaper and font right out of the box. Well the great thing about BlackBerry is the amazing level of customization that it offers -- you can change up most everything on the device to your liking, including the font.
The default font looks a bit big and fuzzy on the new BlackBerry 7 devices, but changing it up to something like BBAlpha Sans Condensed can give your display a whole new look. To change your font, simply head to Options > Display > Screen Display. Pick the font you like, tweak the size and style and you're custom all the way. Play around to see what works for you or just change it up when you get bored. Happy fonting!