Tbh Pot5 is one of the worst servers for PvP. Now this is just fro ma reg perspective, but both Imps AND Pubs are horrible. I was mainly a Pub player throughout my time on Pot5, and the PUGs there are just BAD, BAD, BAD. I did end up leveling more Imps to 55, and you know what? Same mother****ing thing.
It's really where you have to premade and dominate or you PUG and be dominated. The games on our server are just REALLY lopsided; however, one of my friends transferred one of his toons to JC (Pub Side), and he said the games there are completely opposite of Pot5's. The games on JC are really close most of the time, and you'll see way more very close games than you ever will on Pot5.
If you wanna be on a PvE server for PvP be my guest, but I don't ever picture myself ever transferring a toon to a PvE server for PvP EVER. I'd probably level a toon, but a PvP server is where I'll always be 99.99% of the time.