> What is your definition of God?
I define God as a supreme supernatural divine being. He has many attributes (all of which I cannot list here): eternal, all-powerful, all-knowing, omnipresent, intelligent, personal, moral, holy, righteous, creator, love, judge, to name a few.
> How do you imagine he looks like?
God certainly doesn't look like a person. He doesn't have any form, let alone a human form. We have three particular images in the Bible of people who got to see God's throne (Isaiah 6; Ezekiel 1; Revelation 4). They use similar terms: bright light, colors, glory, brilliance, beauty, surrounded by other spirit (not divine) beings, some palpable sense of power, majesty, splendor, holiness. It's about all we have to go by.
> What does God DO on any given day?
* He sustains all of creation (Heb. 1.3)
* He holds all of creation together (Col. 1.17)
* He upholds the cause of the oppressed and gives food to the hungry. The Lord sets prisoners free (Ps. 146.7)
* He is continually working to reconcile all things to Himself (2 Cor. 5.19)
* He is continually working to draw all people towards Him (John 12.32)
* He is reconciling people to Himself (2 Cor. 5.18)
* He gives appropriate spiritual gifts to people (1 Cor. 12-14)
* He indwells His people and His Church (Eph. 2.22)
* He listens to and answers prayers (many, many many references)
* He is seeing His plan of salvation through to its conclusion.
* He is revealing Himself through His creation and to His creation.
I would say He's pretty busy. After all, the universe is still of unknown dimension, and there are 7.6 billion people on the planet.