Sorry for my bad english.
Most *real* scientists think that, in fact :
1° We don't KNOW the limits of life. In the past of our planet, we know really strange life exist.
2° We have good hands because we are tree animals with fruit alimentation (fruits are the ONLY food which suffices for our life: We will be able to eat only fruits and to be in better health. No other food can do that for us). All the other animals with a similar food have very nimble "hands".
3° We have binocular vision because fruits are littles preys, more ellusives than others vegetals.
4° We see colours because of fruits. It's NECESSARY to see colours if you want eat fruits on a regular basis.
5° Our digestive system is adapted to nourish fruits: We believe being omnivores only because fruits require a digestive system between that of the carnivore and that of herbivorous.
6° Opposite with an old belief, the majority of the animals know the totality of our feelings. They can often recognize them at other species that theirs.
7° Opposite with an old belief, animals know abstract.
8° Opposite with an old belief, animals make long term plans.
9° Opposite with an old belief, animals use tools. OUR tools is they find it. Stop to see TV-documentaries, sillies !
10° Opposite with an old belief, we don't are the most curious animals (that's canids. Fox, in fact).
11° Opposite with an old belief, we don't are the younger specie on earth. That's hyenas.
11° Opposite with an old belief, animal know what sex-games are.
12° Opposite with an old belief, a species is not only a genetic thing.
13° Opposite with an old belief, we don't have the better vision (carnivores see better motions. A LOT).
14° Opposite with an old belief, animals know what war is. And they can be good, with tactics and even strategics.
Don(t be silly, aliens can have really odds apparences. Good SF have a lot of non-humanoids aliens. One on my personal favourit are Fairies. Fairies are... blobs. Imagine a blob-civ is really funny, but, you know, don't use technobabble.
I liked the boog-old Ascendancy. Even with the crapy-AI. Aliens are rally refheshing in his game. Goods. I don't like the "ape-drengin-klingon" stuff.
And even "bipedals" aliens d'ont have to be "humanoids". Lot of animals are part-bipedal. And a lot more can be in bipedal station for a time. And a lot know to use their front paws in surpizing ways.