So i just completed ME3, and i can see where there a controversy over the ending but maybe I am missing something. I chose the ending where I wanted to control the reapers and had them leave earth, then the Normandy crashes on an alien planet and partially opens the door. So what were the other endings? And does anyone know what the door opening will reveal? Anyway explain everything you can

As an aside I must say that i was more emotionally attached to this game than i have been for a long time, which was cool. I really did not like seeing Garrus and everyone die... and who knows what happens to everyone else

Bioware released new content to explain in more detail the ending, you should go and download that, unfurtunately for me I chose the same ending as you,but i beat the game 3 days after release, then decided to trade it to get a new headset at Best Buy, then Bioware came out with this Free" DLC to expand the ending...bloodi hell, so im unable to go back and see what "really happened", good luck.

The new ending DLC isn't out yet. I think it's due later this Summer.

Anyway, the Mass Relays are destroyed in every ending and the resulting explosion is what the Normandy is flying away from (in FTL, not through a Mass Effect field). They crash on a random planet and you should have seen Joker and another crew member or two leave the ship.

The other endings are fairly similar but the colour of the energy that destroys the Mass Relays are different. If you choose synthesis the same sorta thing happens but instead of the Reapers leaving, all life merges. On the planet the Normady crashes on the leaves have circuits in them and the crew members have tech in their skin. If you destroy the Reapers they blow up. If you destroy the Reapers and have a high enough Galaxy at War rating you should see a secret scene at the end where it appears Shepard may live.
 
If you wait until the end of the credits with each ending you should also get an old man and a kid telling the story of "The Shephard" set 1000 years after the event on the planet the Normandy crashed on.

Does that help?

What was your Galaxy at War rating btw?

scoobes explains it well, and if you want to see the Mass Effect 3 endings, they're all in this video below, playing at the same time (there is barely any difference)

Bioware are fucking morons.

none of decisions matter

YES this does help, I dont know what my rating was... I rented the game and had to return it. But I only had 2 choices, so it must not have been high enough to be offered the third choice. And It is odd that i selected the save the galaxy and control the reapers option but i got cut off before the Normandy ship door opens... that is pretty weird to me. Overall, i know it is a game but I hate when characters I like die. I knew Shepard was going to die but everyone else did too. Oh well, over all a lot better of a game that i thought it would be. THANKS

you got the worst ending possible which means you only saw like half of it. best ending reapers get pulled from earth everyone celebrates mass relays all get destroyed normandy crashes everyone walks out, and there is a shot at the end with a guy lying there in a n7 uniform then jolts a breath of air and hits the credits.