@Liquify: Look up WoW's RP, RPPVP servers, or Conquest of the Horde (a private WoW server with even stricter RP than PS).
I've been playing a bit of WoW. There's a reason 11 million people pay $15USD a month to play that game. Being a commercial project, and such a successful one, I think it's a bit silly to try and say it's inferior, especially considering you've never played it. It kicks Perfect World square in the teeth any day. I'd rather pay to play a great game with complete balancing than a 'free' game like PW. PS is an exception as it has great potential and promise, and is actually free. Let's not confuse 'free' games like PW with -free- games like PS.
As for PS and WoW comparisons, there are actually a few similarities that I've noticed... and since you've never played WoW, how can you tell someone off for noting similarities you yourself could not see?
@Vakachehk: PS has a 'Valley of Trials' area, it's called tutorial. It's better than before, with the new questing system.
About exhaustion: Quit complaining and visit a strength trainer, or endurance. People DO get exhausted walking with backpacks weighing the same as a full PS inventory. If you get tired on an empty inventory, that's because your character is WEAK. Train a bit, or RP that you're a weakling.
@Athrani: "Energy Potions" sound good, like having a quick Red Bull / Lift+ / V / Guarana based energy drink on the road.