here's my favorite thing to say when this comes up:

Yuna: I love you Tidus!!!
Tidus: You RETARD!!! For the last time: MY--NAME--IS--BILLYBOB--JIMJOE!!!

Though they could have said his name in X-2. It wasn't so obvious in X when they were speaking TO him...but in third person it was annoying. I mean, how many people never played X but played X-2? They probably didn't know who the hell Yuna was talking about.

Yuna: I love you...erm...what was it now...OH, I KNOW...I luvywuvy you Voldemort!!
Tidus: *pats her head* Sure...lets just go with that...