It makes senses to put all the sensors up forward, and the waste management system astern. But does a crab have a face? And the brain of an octopus surrounds its alimentary canal.

We know some similar structures have evolved independently, like eyes, both molluscs and vertebrates have similar optical sensors. But others, like the lateral lines of fish and insect antennae, are very different to how mammals are equipped. Many creatures can navigate a universe of olfactory gradients!

I don't doubt there will be some aspects of alien biology and behavior that will be familiar, but there will also be others that are totally unexpected.

But I also expect that whatever weirdness we do encounter, there will be some life form on earth that has adopted a similar strategy. Similar problems will be handled by similar solutions--but not necessarily. And I suspect that the social organization and behavior of aliens will be radically different from ours, even if their anatomy, physiology and chemistry is not. Cooperative technical intelligence only arose in one species on our world. That doesn't give us many examples to compare and contrast.

Science fiction has done an excellent job of speculating about alien biologies, psychologies and cultures. Some of these speculations may be off the mark, but its still a good place for astrobiology weenies like us to look for ideas.