I think this is a good point. The number of possibilities is too great to imagine, and there very well could be some type of life I simply can't envision.

"What is there to stop evolutionary processes to happen on a quantum level?"

There are entropy constraints on the conditions under which life can evolve. There must be a persistent storage mechanism that degrades at a certain rate. Too fast, and the mutations pile up and the organisms all die. Too slow, and evolution can't operate. I suspect that most possible life would have to rely upon carbon-oxygen or something similar.