Well first things first. I just got done putting in the region switch and it all works just fine. :D Here's a link to the channel that has the tutorial I used. I had to send the dude a PM and clarify some shit but after that I got to work and everything went perfect.
I don't have any strong recommendations because a lot of the imports I personally would like are expensive as fuck haha! The Dungeons and Dragon's collection by Capcom is something I'd love to have a legit copy of but I'll stick with my burnt copies. Psychic Killer Toramaru is like one of the most expensive Japanese games so again, burnt copy. But the region switch makes them just a touch easier to play! Precision25 also gifted me some SNK fighting games and a Twin Bee game. The Twin Bee game is pretty bad ass. Some day if I learn Japanese I'd like to get a copy of Bomberman Wars which is a strategy RPG. I might pick up a Japanese copy of House of the Dead but I do already have a burnt copy.
Another use I have for the region switch is the VCD card, you have to boot in Japan mode to use it. That also works just fine. The switch I'm using is kind of fucking huge so I might get a project box from Radio Shack and put the switch in there and attach that to the battery cover.
And by awesome I mean totally sweet.