Not really, WoW/other mmo's tend to overload you with quests and send you miles at a time, frankly Rift is quite modular in its questing, you get quests, they are all pretty damn local, you finish, hand in and move on never to come back really.
You won't be killing hundreds of mobs without handing in quests and since I got 10 slot bags(with 20 slot main) I've really not come close to filling them up at lvl 27 now, other mmo's at this point I'm saving for 5 top tier bags.
THe genius part is, 2.5plat is a lot till around mid 20's so a mount is quite expensive to start off with, but because they can't tell whose got the CE everyone has the mount at the moment till the game goes live and you put the real game code in. By which point everyone will easily be able to afford a mount as it will be small change at that point
I've only seen a recipe on a vendor for 20 slot bags though, but as thats available to anyone I'd expect late in the game to have 24 slot rare bags, its not a big deal.