I figured out I was able to get to into the bootloader, if I attempted to from a cold start, not from splash scrn (Vol. Down + Power). Wiping everything from there, did nothing. Only re-flashing the ROM got me back into the phone. Since I already lost everything!, I tried this again. And again. And again.... And so on. Sometimes with "Font Changer/Custom Font Switcher" app, sometimes with Font Installer, sometimes directly with adb, sometimes I used another technique. Sometimes I used the fonts that came with the apps I tried, sometimes they were fonts I downloaded that were converted for android, sometimes fonts that I converted myself (to ttf). No matter, almost EVERY attempt borked the phone! In the rare cases it didn't, the font never seemed to have changed!