Should God look like human being, with head(s), limbs, etc.?

No. Only in his fleshly form (Jesus' incarnation). God is a spirit. He doesn't have form. When God said He will make man in His image, He was speaking of body (Jesus) soul (Father) spirit (Holy Spirit).

There are immutable laws that govern nature, but they do not represent God. If anything God follows the laws in bringing about his works.

The reason that God (in the three major Abrahamic religions) looks human is because the source (Bible) says that God created man in (or after) his image. Therefore, God is a biped, having the shape and appearance of a man.

Although many places in scripture and Talmud speak of various parts of G-d's body (the Hand of G-d, G-d's wings, etc.) or speak of G-d in anthropomorphic terms (G-d walking in the garden of Eden, G-d laying tefillin, etc.), Judaism firmly maintains that G-d has no body. Any reference to G-d's body is simply a figure of speech, a means of making G-d's actions more comprehensible to beings living in a material world. Much of Rambam's Guide for the Perplexed is devoted to explaining each of these anthropomorphic references and proving that they should be understood figuratively.

We are forbidden to represent G-d in a physical form. That is considered idolatry. The sin of the Golden Calf incident was not that the people chose another deity, but that they tried to represent G-d in a physical form.

Mankind is created in God's own image. There are many verses indicating that God has all body parts like eyes, hands, fingers, mouth- just like humans have. Though He is a spiritual being which has no physical aspects like size, color, etc.

By the way, how does Jesus look today? See Rev 1:14.

Now you can imagine how God looks!

No. God should not look like a human.

Say if Evolution theory was correct [not saying it is or isn't] then a billion years from now humans would be far more Intelligent and look completely different.

Well if God...the highest possible being is the most Evolved in all that exists...would he really look like your average Joe? I think not.

Besides, let's not think in materialistic terms.

God is spirit. He does not have a human form. Any time the bible attributes human form, emotions etc to God it is a figure of speech.

God is Spirit, without form. God can not be seen but can be experienced.

If u could compromise with your question as "CAN"...instead of "SHOULD"..........i think i can tel u something..!! god is the one who has created us...n is believed to have the supreme power....he obviously can be in the form of a human....!!! think of it...!! :)

Wait. What's the question?

God created Man in his own image............You be the judge.