I usually use whatever emblem/title that looks cool, because 1. I can't remember how hard it was to get one since there's like 53536122 different titles 2. I really cba to actually check my callsign list after every goddamn game.
But i was thinking, what would you say is the *hardest*(most time spent/most tricky to pull off) title is? The "x amount of nuke" emblem seems decently hard , then again, alot of people boost to get that