I don't know of any MMOs that allow for name display changes. The developers of FFXIV keep pushing the idea of being original with game design. I think being able to change the look of your name would be a cool little feature. In general, the more freedom I have to control aspects of my character, the more I like the system.
The most important thing to me in name customization is the ability to use the spacebar. This should have limits, after some thought I think four spaces is about right. It would have to be limited, otherwise chat windows would be cluttered with names with too much s p a c i n g.
For example, in most MMOs a character name would appear as Jackiepaper. With the addition of two things this name could look much better. All it needs is a space and another capital letter.
This of course brings me to my next option, capital letters. This one also needs limits. Again, I think four would do. This would prevent people from being too awesome, but you could still be awesome with a short name (like ZOAH).
All slash functions could be the same.
/invite jackiepaper would invite that character. Upon entering the party, the character name would be displayed as Jackie Paper in the party HP/MP bars and their name would appear the same way in chat
Jackie Paper: yeah, I know some stuff about dragons brah.
Edited, Feb 22nd 2010 12:07pm by ELodius