Which Films Got It Right On Aliens?

 
Our Milky Way galaxy is estimated to contain between 100 billion and 400 billion stars and is just one of 2 trillion estimated Galaxies in the Universe which with the help of Google means that there are about 200 billion trillion, or 200,000,000,000,000,000,000,000 stars in the Universe.
Our Star has 8 Planets swirling around but ESA exoplanet data estimates that there is an average of 2 planets per Star which gives us a best guess at there being 400 billion trillion Planets on which life could have evolved and which makes it absurd that it is just us and there are 199,000,000,000,000,000,000,999 other balls of rock and gas just going around empty.
So on the premise that life HAS to have started somewhere else as well as here, i asked a scientist what do they think life would be like there and i presented a list of sci-fi films to see which they thought may have got closest.
Instantly dismissed as least likely was Humanoid such as the ones in Avatar or Star Wars because it is extremely unlikely that Evolution elsewhere would end up with the exact same intelligent bipedal primates (or us) at the top.
So if not humans how about bugs and insects like Alien or Children of Time? Again not likely due to the evolution process means that they evolved here due to the conditions on Earth which are unlikely to be the same elsewhere so they would not Evolve the same way.
Poo Pooing any evolved life form as the different conditions would mean they would not be anything like we have here, we moved onto Robots and AIs and this was a bit more likely as so we could be looking out for Transformer robots, Cylons from Battlestar Galactica?
Due to the sheer amount of time it would take, Aliens would probably leave their bodies at home and send robotic substitutes or even cyborg replicants made of flesh and machine such as the Cyber Men or Daleks in Dr Who so the first contact would be with one of these types.
Just as i was picturing a Spaceship full of large dustbins screaming Exterminate my camp fire was well and truly watered on by the final and most plausible type of Alien being one which we may not even recognise.
It may be made of rock, gas, metals, minerals, water or anything non carbon and for all we know, they may already be here but we just dismissed them so that leads us to the film, The Abyss, which was about nice watery aliens who saved humans so they are welcome here although if they do turn up and asked to be taken to our leader, we may need to turn down the heating in Downing Street.