Very true, although in my experience players who only pvp generally have a disdain for pve. Not entirely sure about how PvEers feel. I think if you want to be a good rogue you should pvp, if only to get used to using all your abilities. Who knows? You might need to evasion tank a boss for a while; I have needed to more than once.

Yes indeed, my rogue became far more useful in PVE after I learned to properly PVP, mainly because it forced me to set keybinds or macros for less-used abilities and to rely on them in a crunch. And since I needed extra keys, this was the point when I removed the turn keys and started relying on strafe, and that broke the keyboard turning habit.

As to evasion tanking (now Improved with Combat Readiness!), every rogue should get the chance to save the day this way. I just had this happen the other night on Corborus, when our tank and a hunter went down towards the end of the fight. Mage stayed alive to deal damage, I humped the boss' leg and did what DPS I could do from the front while dodging like a madman, and druid heals kept me up just long enough to get the job done. Eat my leather, gyreworm!