Behold the Frictional god Ficsean!
1) I am the god of friction.
2) I have the ability to manipulate the friction of myself and my surroundings (including living things), which enables me to slide objects or myself around with ease, keep myself or objects firm on the ground. Inversely, I can also 'trip' enemies by drastically lowering their friction. I can also decrease my own friction to glide and slide at high speeds.
3) Assuming I remain as a humanoid, I will look the same, but to signify my importance, I will wear a black spandex suit covering most of my body. However, I will be wearing sky blue gloves, sky blue boots, and the portion of the suit where my face is would also be sky blue.
4) I will stay in villages or forts for weeks or months at a time, helping civilians capture hooligans or haul heavy loads. Once I gained enough reputation, I reveal my identity as a god (keeping the fact that I can only control friction a secret). Should that not convince people, I just move on, leaving them to the burdens of the laws of physics.
5) Why not? To glide through villages, to see the surprised and excited expressions of those you pass, and to gain a large party of followers to help spread your reputation, that sounds like a good way to spend eternity.
Hang on, I created a superhero, not a god. Oh well, I guess those two are interchangeable in such a world.