I would accept that many of them behave like humans born on earth would, but that must be an artefact of poor translation or our poor understanding of their motives and objectives [Watsonian] or lack of vision on the writers part [Doylist - to borrow some terms from the Bujold mailing list - think 'as written by' Dr Watson or by Arthur Conan Doyle].

Would we help him to pack his Gladstone?

She brushes down her hair with a little bit of spit and a smooth of her hand and opens the bright green door, walking a few metres, squinting.

And lothly mouth, unmeete a mouth to bee, / That nought but gall and venim comprehended […].