@Asu, I've learned with most PvP things in some MMO's (Star Wars KOTOR, WoW, GW1 and such) that's it's really all about starting off with ONE build that you like and get used to it. At least that works with me. Sure, all builds have up and downsides.. Start off with a build that seems nice, and purge your way through people is always a good place to start. When you then has gotten pretty used to it you can start experimenting and tweak it - or try something new! PvP gear is free! Woo!
but seriously. One build you're comfortable with. Bash heads, repeat for a while. Then experiment.