I think the
xX's and oO's are kind of annoying... but people have reasons.
Some might just like how they look.
If I had a pretty original name, and decided that I'd make a character with the name, then found out it was already taken, oO or xX would just help get around it.
I wouldn't call it duplicating...
I think the i____ is kind of creative. It wasn't that popular when I made iTalk.
... I don't understand why people put BR after their name though.
Why should we care if you're BR? o___o