They tend to show a lot of the more expensive games for a system, like they're more showing off the more expensive games that they own. Example: there was an episode about Genesis shooters, and one of the (if not the first) games was Cotton. They just HAD to remind us how hard it is to find and how expensive it is, and also how much he paid for it.
THAT BEING SAID, the videos are actually very well made, although the dialogue is very forced and wooden. A guilty pleasure of mine is to smoke a bowl or two and start up a few videos, as they tend to be a little on the long side (the Sega CD ep was almost 40 min.). I appreciate the obvious Sega bias.
Everyone has their taste. I, for one, don't like Gamester81's videos, however, I'm grossly outnumbered in that respect. AVGN also lost its luster in recent years.