You want to know what is a good endgame for Diablo3?
Ever wonder why D2 still popular and people still playing it for century?

Cause is the concept of the game which made the game itself having a high replayable value. They make it to lvl 99, but to achieve it takes a very long time! but you can complete hell around level 60 to 70 with no problem, as long as you have the right built and right items in hand.

People will usually start farming at that particular level and think, level 99 is not their aim, is how the game provide so much variety to them to test the gamers creativity to combine skills and equipment and building their ultimate/fun combo to play D2. Is not about owning the hell, everyone can complete hell, is about continuously trying and trying to perfected a built, to prove that this built works, and hunting the appropriate equipment to support the built the players come out with. It promote creativity. It promote try and error, in a fun way, and it promote replayability over and over.

You can follow certain built, its work, but you can always come out with some crazy builts, less effective, but fun to play,

Heard of charged bolt sorcerer? I play just that, it don't owned the hell elite or champion most of the time, but is fun as hell when you stack up as much as +all skills, +charged bolt skill, +cast speed, +lighting damage and +mana regen, you hitthe max, you cover the floor with hundreds of bolts.... is fun as hell. Does that make you powerful? No, i cant forever beat every bosses, like those immune to lightning damage, but am i having fun, yes! My friend would go like "hell you make half of my screen white!! lol"

Blizzard didnt forget what FUN should be, a different team of dev just think that profit is much important in the end so they go on with whatever plan to protect their RMAH.

The skill was stagnant, sure i can use lot of different combo too, but i can just easily clear hell with whatever combo i built, moving to inferno which claim to be endgame difficulty, we are all stuck with 1 - 2 primary combo which secure you with survivability, is not even fun when gear play darn important rules to enhance the survivability, and the generic item affixes. Yes, i never complaint on the drop rate, is the boring item affixes that i can't comprehend. Is all come down to only +all resist, +vit, then +stat for your particular character, +IAS, +Crit and +Crit dmg to survive inferno. Yes, you can just shut me down and tell me to just play hell, and yes, that is where i stopped.

Is never about listen or not listening to fan, the game is just fun till hell, after that, end game is just too AH dependance, and what do you look forward in the end? No? Nothing. Keep farming for those generic items? Waiting for the lottery to strike? I like that to happen, but that cannot be the end game, especially toward generic item farming.

So the whole D3 can be summarize into, play, test all your skill unlocked, reach hell, try the best combo, farm and keep wonder when you can get those item that display in the AH/RMAH. When you finally get to ACT1, it get more generic and linear with NV elite farming. That the endgame? Still using the same old gear you wear from hell, and with the same still combo that allow you to survive in inferno?

I think i made my point. D3 is not a bad game, it just lack of endgame, i am not saying for majority of people, just expressing my thought on the game, probably i am a crybaby like the other say, but without crybaby, there is no quality game nowadays and yes, go and keep feeding these kinda dev, they will make more crap, and you keep playing crap. Oh wait a min, is a gem to you.... sorry... i mean you can keep playing the gem.

My 2cent.