Beric if you want to simplify it, elementalist. His main specialty when it comes to force powers is controlling the elements à la Avatar: the Last Airbender.
If you had to ask him how he sees the Force? He would say that everything is the Force. Down to the smallest atom, in Beric's vision and senses everything is interconnected. He doesn't need to create a metaphorical vision because of his understanding, and because that is literally what he sees. In order to be able to control the elements like he does, he has to be able to persuade the Force that is inside each molecule of hydrogen and oxygen in a windstorm to change direction, each grain of sand in a sandbank to lift and float, each flake of snow to form themselves into a snowdroid. Introducing metaphorical visions to his psyche would cloud that ability, and so he just sees the Force as it manifests itself in the physical world.
Of course, what if there is a being powerful in the Force, not just a random tree or stone? Well say his apprentice
Millu Lee
walked by, Millu would just have a stronger aura in the Force, kind of like the light of a bonfire compared to a candle. If he were to reach out with his senses, Millu and a rock wouldn't be converted into some metaphysical metaphor, and they would still appear the same as they were physically, one would just be able to sense a stronger aura about Millu.
Beric doesn't think that there is a natural dark or light side to the Force, and the Force simply just is; however, he thinks that the light or dark sides of the Force are ascribed to certain abilities because of either their potential to do harm to another, or potential to do harm to oneself. Many dark side abilities that are used, are used at the expense of the user mentally; this is why in his eyes those dark side abilities should not be used. Conversely, other dark side abilities use the Force (in his eyes) in perverse ways to create monstrosities or to inflict unnatural and unusually cruel harm. This is why, in Beric's philosophy, the distinction between Light and Dark were first made, in order to keep oneself from spiraling mentally and physically down a self-destructive path.