One of the aesthetic differences HTC have made to Android in their fifth iteration of Sense is the replacement of the regular weight Roboto with Roboto Condensed. I happen to really like the look of the condensed font and so I set out to make the same change on my HTC One X with CM10.1.
I came across an update.zip over at XDA-Developers that replaces the default system font with Roboto Condensed. Your phone must have a custom recovery installed, and although the thread is for the Galaxy Nexus, it does work fine on other devices. But things can always go wrong, and neither I, nor the author of the thread can guarantee it will work on your phone. As always, make a Nandroid backup before flashing.
There are a few more photos in the gallery below, and you can download the zip file from the XDA thread here.