Set aside a hundred hours or more if you really, really want to experience Fallout: New Vegas the way it was meant to be experienced. New Vegas isn't for someone who is looking for a ten or twenty hour experience, or even a fifty hour experience. Some of the game's greatest gems, in fact, are ancillary quests and location explorations that you don't even have to undertake to get through the game. We highly recommend you take your time with the experience, and see and do everything in the game that you possibly can. With that said, journeying through New Vegas will require patience and a willingness to lose time playing the game.
Really, you're going to be required to dump time into New Vegas if you have any hope of getting through the game's main narrative, which really only makes up for perhaps five or ten percent of the entire game. New Vegas isn't something you can just pick up and optionally put a lot of time into. In reality, it's much, much more than that. 1.) Take Your Time - It's a complete and utter understatement to say that Fallout: New Vegas is a time-suck.