Action: Would definitely be Dual Wield Pistols. They have a very small blind spot

RPGs: Well I have always ben a fan of dual wielding anything, There is a game called Jade EMpire where you can dual wield staffs, and swords. I like dual wielding Broadswords

Adventure: Adventure is kind of a mixed bag. It really depends on the type of adventure. I would probably go with a whip with shape edges on the tip of it.