Eh, I guess we'll just have to agree to disagree about the grinding part.
One thing I know for a fact is the simple idea that GW is a lot more balanced that WoW, I've spoken to people about it, and they plainly say that Rogues and Paladins generally rule in PVP, in GW there is no overruling class, no one skill that destroys everyone else, skills are built specifically. Every class has a cancel skill, an interrupt skill, a healing skill (or several), skill that cause conditions and hexes, and while it may sound like every class is the same, they all work in different ways.
Add in Blizzard's love of nerfing things that are percieved as overpowered and it just plain turns me off playing it. Vanilla is not my favourite flavour.
Like, rangers have a skill that interrupts a skill and blocks it for 20 seconds, mesmers get a skill that when cast on a character means the next skill that cast fails and they take damage. Pure damage and whatnot are never the answer, you have to be sneaky and tactical.
And the only EXP depreciation that occurs in GW is from enemies, as you rise in levels, lower enemies give less while the EXP you need to gain a level rises, but what you get from quests remains exactly the same.
Oh, and the transport in GW is a nice simple press of the M button, and you can warp to a town you've been to, which while being simple, is a lot nicer than transport in other MMOs.
God, I hated transport in RO, had to walk far too much, or rely on Warpolytes. I suppose the variety of transport in WoW is nice, but I still prefer my nice simple map in GW.