I like using Veilstrider and Insane on this character. I wish I’d gotten Servant of N’zoth when I could but it seems to be broken and unavailable now.
My DH is Predator
Mage is Seeker of Knowledge
Pally is Hand of A’dal
DK is Undying
Druid bounces between various lore appropriate titles. Usually Guardian of Cenarius for old times sake
for the Alliance.
Because it just sounds cool and it’s one of the achievements I’m actually proud of.
I hope they do a big meta-achievement title like Veilstrider for DF too. That was fun to get.
I like using the Butcher for alliance and the Bloodthirsty for warriors because both titles are a bit more brutal than others. I like and would use Justicar more on my pallys besides Phara if the title was account-wide. I like using Troll Hunter for my gnome and NE hunters (if the forum displayed your title along with your name in posts, I’d use Troll Hunter more on the characters I post on 
). For the two void elves I have, I use Slayer of Sin’dorei. I like the savagery of the Butcher the most.
For my mechagnome whose named “Pocketgnome” it is the Niffles rep title “Smelly” → “Smelly Pocketgnome” is hilarious to me.
For this toon, I really like the new “Champion of the Dragon Flights” - on other toons I just use “Zookeeper” as my default. That was the first real “grind” I did for something I really wanted in-game when I returned in DF.
My main has been “Warlord Nazz” since I earned the title during vanilla pvp.
Other titles that I use on alts tend to be those that take considerable time to attain like: “the beloved” or “the admired” (60 or 80 exalted reps, respectively), “the tactician” (honor level 300), and “the bloodthirsty” (250k honorable kills).
Hand of A’dal , Champion of the Naaru, and then Lt General on this toon…mainly cause of the “general Disaray” reference
Lieutenant General is my favorite title but only usable on my Druid from vanilla. I’ve been hoping for years with all this account-bound stuff that it will be usable by all of my toons since I do not main a Druid any longer.
Warbands and all the work coming with accounts has me hopeful I can use it on my Warrior soon.
Yeah it would be nice to use it on other characters. I think either way I am fine with it though. Either it stays pretty rare or I get to use it more.
My favorite is the Hordebreaker.
“The Dreamer”. It was the last title I earned w my raid group, most of which have quit the game.
“The Insane”.
Because i was insane enough to get it on my Warlock and i was able to use the title on this guy, ironically enough.
Conqueror of Azeroth
Cuz man that’s a good title