the one thing to watch out is, the majority of RP (that I have seen) has been ERP focused. On top of that, many female characters (likely played by males IRL) have certain male physical attributes. I don't know if the majority just don't know how to faithfully play a female character, or they are just so attached to their little friend that they have to attach one to their females.... it is just a very high percentage of them.
That's not to say Tera is bad for RP by any means, I love it there. Just offering a friendly warning to check whats under the hood, before you drive it