I beleive that what counts most is being with God. That is the real happiness of being in heaven, praising Him together with others that also are Saved. There is different thoughts about whether you will recognice loved ones or not, yet we will all have a connection in some way, I think. We do will be our own unique selves in heaven as we are here on earth, we are just going to get a new and more perfect body in Christ.
Still, I think we will all be a lot more focused on God up there than in humans. It is all about Him!
Also some thinks of how one can rejoice knowing that some didn't make it getting to heaven. God does will wipe away every tear from our faces, and all our pain will be gone. We will only have an immense joy within us, filled up with praising to Him. Yet it is difficult to fully understand this, also I many times wonder "how long is forever?" and "What about if God would get tired of us sometime?" These things have easily been worrying me sometimes, since I wish to live always, and not to suddenly find myself to disappear into becoming "Nothing".
We will only find out how it will be in heaven, once we are there.

Also, it is best to not worry too much, and trust everything will go fine. As long as we will be with God, this is what is most important.

-God Bless-