Will you think
Yes but only good and nice things,
... and make choices
Yes, but they will be all the same choice that God would have made.
will you be aware you are in heaven
Absolutely! There will be an absence of Communists, Minorities, Queers, Catholics, and Democrats! It'll be like living in a gated community in the very best part of Kansas.
will you remember your life
Yes, but it won't seem important, mainly because it wasn't.
will you only feel good feelings
Yes, indeed these are the only ones that you will feel. We know this from the true story of Lazarus who was in Abraham's bosom when The Lord told the rich man in Hell that he was getting no water. Lazarus did not feel sorry for the rich man - so when you are in Heaven, you won't feel guilt about all those who are burning in Hell. You will smile like a Mormon Missionary at the door and say, "I told you so." And everyone around you will nod in agreement. And then you'll go back to sipping Mint Juleps and chatting with Jesus.
Anyway, how could you possibly be unhappy with the Celestial TV having an infinite number of channels dedicated to God TV and re-runs of "The Little House on the Prairie"?
Will you be self aware and cognizant
Just a little more than you are now. You will know that you have always been right in everything you have ever said, done, and thought and those atheist arseholes at WWGHA have been proven wrong... If only you could tell them... Well, now you can - just look down into the Fiery Pit of Destruction and laugh at them (see above)!
will you gain knowledge of all the universe and beyond
You seem to be confusing Heaven with a Masters in Science: this is a common mistake amongst the unGodly.
You will realise that every Word of The Bible is True and that the sun is a huge ball of coal well over 500 miles from the Earth which it orbits. You will see how Earth is flat and the sky is solid (except for the holes where the rain comes in.) You will no longer have to keep convincing yourself that invisible beings that do magic at your command are real