(SPOILER)
I did the red ending again, but was gonna choose synthesis then I was like wait this thing was created by reaper smurf outta here. Keeling you all. Gutted that they didn't confirm that all sythetics are in fact dead. Not that I actually care though cuz as Admiral Hackett said, they can easily be rebuild again. The only thing I know will take some time is the Mass Relay.

I laughed so hard when they started showing the pictures of Jacob, Zaeed with a drink etc., it was a bit weird, but none the less I think they did a good job filling in most of the plot holes especially the one with Joker leaving Shepard although I got in the non-extended ending that it was most likely because everything is gonna splode. Also almost wtfed when Liara put was gonna put my name on the RIP board, but then was like, "nah she's still alive k." And then I was hence the breath at the end.

Regardless lol endings I'm curious about Mass Effect 4. I think the game will differ greatly depending on if your Shepard is still alive or not, but it would especially be interesting to see what happens in the next game when a player has chosen the Synthesis ending.