Had 2 favs, both for different reasons.
Kruuank, as mentioned, was my first character and Muuloc basically let me pick my title after some badass smoked me with Greeting bash lock for like 22 rounds.
Really loved Thrakazhaars title because it made me seem badass. Thrakazhaar the Unrelenting Beast of Battle. F yeah.
Had a few others of note. Kisser of Divine Feet or Too Stupid to Live were funny (Dhaezym and whomever my shifter after the great purge that RayBaer hated). Fit to Punt was a good chuckle (another shifter who liked messing with Enlilth).
Had one I didnt like for obvious reasons (Jindichos). Ghrimriddor had a bunch of cool ones too but in many ways I thought that character was a failure.