Ah, I get it. Looking more for guidance in terms of what you might want to play. There are some parallels to WoW though the guardian is much less like the paladin than it seems on the surface (unless things have changed significantly from the beta). I guess it's a bit closer to a protection paladin but minus most of the holy magic.
As for the others, elementalists (which I play) are like mages, necromancers are like warlocks, warriors are pretty much the same, thief = rogue, you're spot on with the ranger/hunter comparison, and engineers and mesmers are more or less unique to GW (though the engineer does share some aspects with the engineering profession in WoW). But yeah, actual gameplay is definitely a bit different. Either way though, I hope that helps! For reference, I also enjoy the leveling experience which is why I havne't used mine.
As for the others, elementalists (which I play) are like mages, necromancers are like warlocks, warriors are pretty much the same, thief = rogue, you're spot on with the ranger/hunter comparison, and engineers and mesmers are more or less unique to GW (though the engineer does share some aspects with the engineering profession in WoW). But yeah, actual gameplay is definitely a bit different. Either way though, I hope that helps! For reference, I also enjoy the leveling experience which is why I havne't used mine.