Funny I was just thinking the same thing, how ever more bizarre the notion of heaven seems.
Isn't happiness relative anyway?
If everyone had everything they wanted, (although this is not possible, as some things are mutually exclusive) then how could they remain happy thereafter. Wouldn't they just get bored there? An essential part of fulfilment and happiness, is the strive towards it and the sense of achievment you feel if you get there. Reminds me of some rich kids born into millions, finding all sort of innovative ways to reduce their boredom and depression.
Where is heaven supposed to be anyway? According to Islam, is it supposed to be a physical or a transcendental state?
True, but I don't see the point of Allah creating us and then changing our nature just so we can feel happy. Is our current nature unable to feel happy? Is God too lazy to make our current selves happy so instead he went for the easy option?
One of the answers to the PoE is that you cannot appreciate the good without the bad but this seems to contradict heaven :S
I don't know what heaven is supposed to be or what the point of it even is. It sounds like God just wanted to watch a massive orgy...
But seriously, what is the point of any of this? God makes life feel so much more worthless.
Sorry, this probably isn't helping with your problems with death