How about titles that's based on how many of one kind of critter one's killed.
Not sure how possible it is, as I doubt there is any sort of tally, but... It would be something like this:

Personal tally:
Goblins: 3,293,252,943
Sun Vultures: 44,509
PGDSpirits: 4
Invasion Critters: 942
PC's: 2,497

Thus the titles available would be something like:

Goblin Bane
Vulture Dispatcher
PGDS Bait
True Defender
Kinslayer

Could work on the opposite, too, where it would tally how many times you've been killed by a certain critter, etc. Goblin Fodder, Roadkill, Why-Do-I-Even-Hunt-Those, and Owned (post-title).

~Solareth