I enjoy video game music and am decent at recognizing it, but I wouldn't consider myself a collector in any sense, nor would I say I'm an "expert" in gaming music (as that would imply I know a lot about the various composers out there).
The criteria for this show is that the game [and the soundtrack used from it] must have been released on a Nintendo platform in North America, unless I do some sort of special themed episode (which is very rare). Other than that, it's generally a matter of taste--I'm more likely to pick music/games I or my co-host find enjoyable or interesting.
...The Virtual Boy, GBA, and DS have 32-bit processors.