I'm still somewhat new to the Fallout universe, and really enjoy Fallout 3.
I also recently started playing Borderlands as well. In borderlands, characters have their level when you hover over them, and quickly lets you know if you should attack or not (if you are a 3 and they are a 10, you should hold out).
Is there something like this in Fallout 3? I know you level up and get stronger/smarter over time, but how do I know if someone is too much for me? When I first started playing this a year or so ago, I would run into someone that was just too powerful for me.