Vegepygmy
First Post
I think that's primarily because it's a plausible reason that most other people will readily accept, and thus it tends to curtail further cajoling to try the new system.In my 20 years of gaming, I've discovered that the main reason why people don't try a new system is because they don't want to spend the money on new books. At least, that's what people consistently tell me whenever I want to run a new system.
For me, the main reason I'd be unwilling to try a new system is that I don't want to invest the time and effort it requires to learn the new rules. I have very little free time as it is, and what little I have I prefer to spend on things I know I like a lot rather than gamble on the relative long shot that I'll enjoy a new thing even more. But if you tell someone: "I don't want to spend the time it would take," they will frequently try to convince you that: "It doesn't really take that long," or "You don't have to know the rules to enjoy the game."
I pretty much do, though. Much of my enjoyment of any game comes from my mastery and application of the rules. So while I might be willing to play in a one-shot, especially if the GM is a friend who is asking me to participate as a favor to him, I'm really not inclined to commit myself to an entire campaign using an unfamiliar rules system.
As for those rules systems I already know and don't like, my available free time is way too limited to even consider that. The GM might be the Greater God of Game Masters, but if he's running Earthdawn (for example), I'm outta there.