Ok sorry to say it but Ferrer has the personality of a safety pin. He has gorgeous eyes and a sweet smile, but he's really dull as a person, zero charisma. In a way Nadal is like him. So that in my eyes makes them quite less attractive.
Well, my opinion would be that he's dull only to the people who cannot see or did not look well enough. Ferrer is clever, he has a sharp mind, he loves reading, he is a very interesting person in my opinion. I'm sure he has a lot more conversation than most other players (at least, the type of conversation I would be interested in, which may not be the same as other people). The fact that he doesn't like clowning around or that he is a bit shy and very down-to-earth doesn't make him boring.
Actually, I think the fact that personalities like his are often considered as boring in today's society is very sad. Nowadays, having a personality seems to be linked with being an attention seeker. You always have to pretend that you are "fun" and "cool" and so on, or else, you are called boring. But to me, having real personality means being able not to care about all this social conformism. This is what I like in Ferrer, he's comfortable with himself, not pretending to be what he isn't, and he doesn't seem to care much about what other people think.
For instance, in today's society you will always be considered "cool" if you give the impression of doing everything with ease, of not caring much about things... Ferrer is the opposite of that, he is obviously a hard worker, very serious about what he's doing, and nowadays that's considered "uncool" but apparently he doesn't give a damn, and he does not try to counterbalance this image or change it.
And I really think he has a lot of charisma. A different type of charisma from Djokovic's (which I also appreciate because it makes me laugh, but it's not the kind of charisma that is appealing to me) or Nadal's (I think Nadal definitely has charisma and personality... he's got some powerful sarcastic humour - by the way, he has a COMPLETELY different personality from Ferrer in my opinion).