The Quiver Killer: You want one bike that does it all. It should handle both uphill and downhill trails effortlessly, and when the trail gets challenging, you want a bike that can step up and make you look like a hero. While there might be lighter bikes that climb better or have longer travel, you're willing to compromise a bit to get a bike that does everything everything.
The Realist: When you go online to see what's new in the world of mountain biking, you're excited to watch the latest videos of young riders pushing their bikes to the limit. Heck, you've ever burped a tire or two off yourself. But at the end of the day, most of your riding is on trails that are best suited for a trail bike, not an enduro race bike or downhill bike. You know that you'll have more fun with a bike that is easier to live with every day than if you push yourself to the extreme end of a bike's capability.
No need to overthink it: You're looking for a mountain bike and one that is reliable. You don't want to get downed in the endless loop of whether it will be the absolute best bike for every root, rock, and clump of dirt you ride it over. You want a bike that will do everything well, and thats it. When the bike gets hung up in the garage, and you go about the rest of your life, you want to know that if anybody asks you to go ride, you've got a bike that will keep up, and you won't worry about it.