Goooood! Gooooooood! Let the hate flow through you! Keep making fun of the ME3 ending and your journey to the Dark Side of Gaming shall be complete!
Look guys, I'm not saying it was the best ending in the world, but I've always disagreed with the notion that all three endings were the same. Would it have been nice if the ending you got depended on all the choices you made as that character all the way through the trilogy? Oh hell yes it would have been nice. But what we got were three endings with three very different implications for the lasting effect on the galaxy. Personally that's why I think it can't be a sequel (unless they allow you to load up your save files from ME3 and go with the ending you picked).
Either all technology has effectively been wiped out, the Geth - if they survived the conflict with the Quarians - are completely wiped out. All the Reapers are dead, and rebuilding/understanding the Mass Relays starts from scratch as the civilizations of the galaxy try to pick up the pieces of what's left.
Or the will of ParaShep is now in full control of the Reaper fleet and uses them to quickly rebuild the Mass Relays, reconnecting the galaxy and allowing things to return to a state better than normal as the unity that Shepard fostered in bringing the fleets of the galaxy together remains while the Reapers linger on as a sort of galactic peace-keeping force.
Or super space magic basically erases all differences between the species, uniting all life - organic and synthetic - in a glorious and boring utopia in which the civilizations that had been converted into Reapers now live peacefully among the races of the galaxy and everyone lived happily ever after.
To be fair to the meme, the ending as originally presented did indeed boil down to what color you wanted to paint the galaxy. But all it took was a little bit of imagination and you could still easily extrapolate the ramifications of each of the possible endings. Hell, I was able to "predict" the EC endings 6 days after the game came out, and that was long before the EC was even being thought of. http://www.escapistmagazine.com/forums/read/9.353986-I-Have-Obtained-ME-3-Ending-Enlightenment-A-MUST-READ-FOR-ANYONE-QUESTIONING-THE-ME-3-ENDINGS (very bottom of the spoiler box in my OP, I describe almost word-for-word the EC endings 6 days after the game was released). Just saying: it really wasn't that hard to see what they were going for. Did they fuck up the execution? Sure they did. Would some epilogue scenes have been nice in the original version? Certainly. But the notion of "All the endings are the same" is just silly.