--> Malthurius - The idea of having the ability to play all the classes isn't based on being "forced" to fill a role. Many people don't agree, but MMOs should not be taken as a profession, they are for entertainment and some people would enjoy getting to play through with all the classes for fun and to get to explore all the content in the game they purchased
(via the experience of playing the same content with different skills and abilities of course, I know it's the same maps every time, but your perspective will change if you're in the back with a bow or casing spells or in the front with a sword and shield)
I have to disagree with you others on what is and isn't a generous amount of storage space, but then again I've played so many MMOs that it's insane. I'm basing my opinion off of my experiences with WoW, Rift, Aion, Guild Wars, LotR online, Rappelz, DCUO, DnD, Vanguard, DiabloX, and undoubtedly many others I've forgotten over the years and those of them that were or went F2P just offered more baseline storage on average than GW2 does, and typically more character slots as well.
I'm also basing my opinions about the small amount of exploreable land in GW2 on the amount of in game land (on average) from the above mentioned games.
I just see no reason for GW2 to not offer up at least the average amount of storage and character spaces that the majority of MMOs do. They don't have a subscription cost, that's great, but I feel that players who aren't on the Hype train for GW2 that are coming in from other games, are going to feel nickle-and-dimed to death.. especially if they've come from other F2P games. It just seems like a bad/greedy business model to me, and one I expect to hurt them in the long run.
That's just my opinions though, only time will tell. I hope I'm wrong, I hope GW2 lives up to the Hype, but for many reasons I'm pessimistic about that outcome. Sorry.