exactly...some character are better against other...

[example]

Barbarians are great against Sorceress (if they got absorb, which most experinced PvP Barbarian has)

but on the other hand Barbarians will have a hard time vs Bonespirit Necromancers, and Sorceress might be able to kill Necromancers, if they are good at PvP.

But you can make an ultimate PvP character...but the character is not the only thing you need...you need experience and the skill to use your powerfull character...