I voted "yes", as in if the option was ingame, I would easily pay 50 million for a unique title. But that doesn't mean I want the option to be ingame!
Now I don't think people running around with ridiculous titles would be too much of a problem. After all you can create your character's name and guild's name, but we have CSRs to make sure nobody creates ridiculous names for those.
But if you could create any title you want for yourself, there would be no more meaning to the standard titles. Why would I train my DA up to earn "Mage of Illusion" if I can title myself "Weaver of Dreams"? Why would I kill hundreds of kitins to earn "Master Kitin Hunter" if I can title myself "Elite Kitin Slayer"?
I see a bit of an analogy to how we received the ability to create custom emotes a while ago. It gives a lot more options, that's for sure!

But before we were able to do that, when we only had the preset emotes, it was kind of a sport to find the appropriate emotes for the situation. It was another little game skill that couldn't be gained by levelling. Many gatherings would have people commenting "Oh, I didn't know that emote!" or "Wow, that's a good emote!" Getting the option to create any emote you want pretty much made the preset ones meaningless and killed that 'emote subculture'.
