For me the evidence of evolution is overwhelming. Human chromosone 2, endogenic retroviruses (ERV), redundancy (human foetuses with gills, human body hair, the coccyx, snakes with pelvises, whales with leg bones, flightless birds, non functioning eyes), unnecessary complications aka. unintelligent design (eg. sinuses, wisdom teeth, backwards retina, appendix, tonsils, shared opening for the trachea/oesophagus), elephant, horse and whale fossils showing missing links, virual and bacterial mutation and evolution, the wide variety of dogs, cabbages (cauliflower, brussels etc.) and pigeons through artificial selection, the difference between the races through mitochondrial-DNA. There is no escaping it for me, humans did not descend from "demigods" but rather from "lower" animals.
The God hypothesis is too wishy-washy for me. How is saying that God made Adam from dust and Eve from a rib any different from saying that Mbombo vomited the world from his stomach, that Marduk created the world from blood or that Atum masturbated the universe into existence?
The idea that God exists eternally holds no water for me. Why the default, natural state of the universe should be an intelligent being escapes me. In addition, the idea that He is omnipotent and omnibenevolent, when correlated with the existence of suffering and evil shows one of 3 things:
1) He is powerless 2) He is evil and doesn't care 3) He doesn't exist
The retort of free will has never made sense to me, because the majority of suffering is NOT caused by the exercise of free will, but by random occurances (Katrina, tsunamis, earthquakes, genetic deformities). In addition, new-born babies don't seem to have much free-will at all. The idea of God handing over power to the Devil for 6000 years to vindicate His name and prove that His way is the best way is at best deficient, at worse pure evil.
To me, theism is just an excuse not to accept our insignificance in the universe. Religion elevates the importance and ego of humans to cosmic proportions, science cuts us down to size and shows us how small we really are. To me, religion doesn't give life meaning, it merely replaces real meaning with false hopes.