So I spent my week off from omgNintendo and things online visiting KouAidou in Tokyo. It was a fun trip and while I did plenty of things Nintendo-related (as you'll be seeing tomorrow), I spent most of time just doing the usual tourist stuff. Tokyo Tower, shrines and parks, Shibuya and even a trip to Yokohama.
Of course, something you fail to appreciate when you're planning your trip as a tourist is that Tokyo is actually very big. Getting to and from tourist destinations is almost always going to call for a ride on either Japan's famous Yamanote line or some other subway. If it's during a rush period of the day, you'll spend it standing up and trying not to jostle people too much with your bags. If it's during a more relaxed time of day, well... then settle down on a nice heated seat and start gaming. It's what everyone else on the train will be doing (who's not reading books or comics or just sleeping).
I saw dozens of PSPs and a slightly smaller number of DSes on my trips, and for a longer trip you can get a lot of gaming done. Factor in my time spent on the trains with the time I spent on my flights in and out of the country and, well, that's a lot of time to spend playing the heck out of Puzzle Quest Galactrix. In the game's favor, it does so much right that I could play nothing but it for a week and feel totally satisfied with my purchase. On the other hand, Galactrix is in many ways a game that became just too ambitious for its own good.