I've found that, despite BW only being out in the Western World for just over a month, that I am already running out of storage space on my Pokémon White - and that's with all the extra boxes unlocked.
I mean sure, I do have all the Kanto and Johto Pokémon (and most of Hoenn) in my PC like a Pokédex, so I knew if I was going to continue doing that I'd run out of room...but not this quickly. I find it unrealistic for someone to have enough spaces to complete the Pokédex, and still have room for event Pokémon and stuff (I'll need at least another 3 boxes in order to fit all of Sinnoh in - and that's cutting out the pre-evolved forms), so I'll probably have to release the pre-evolved forms of Pokémon and just sort it with the highest evolution stages (*sigh*).
Considering there are 649 Pokémon now, do you agree that 720 spaces just isn't enough, or do you think it is enough?
Perhaps in the future, GameFreak can make a DSi/3DSWare Pokémon Box...