Probably my biggest complaint of this generation was the proprietary hard drive. What a way to dick over gamers by charging them such a disgusting mark up for basically the same tech as the competition. Now, to be fair they have gotten cheaper over the years, but let's not forget when 120gb drives were $130+.
Do you think MS becomes more open with their next platform? Sony has done it, and it looks like Nintendo is embracing the idea with the Wii U. In my opinion, if they're gonna charge the same ludicrous amount of money, at least come up with a clear advantage over the competition. SSD possibly. SOMETHING.