The game is pretty friggin awesome. I'm almost through Act 2. Enjoying it a lot, especially trying to understand the mechanics behind things.

>2. When we finish a side area quest, even though monsters are most likely around us, the quest completion window appears, which is pretty annoying. I need to check all rewards quickly or need to fight while the most important part of my screen is under that window. Making it "dismissable", so i can check it out when i want would be awesome.

Yes, this most definitely needs tweaked. As someone still learning the game and not being an expert gamer in anyway, panic mode ensues when this window pops up.

>3. Potion usage feels wierd. I cannot exactly tell you why it is so, but i just don't feel it. If i just press once, most of the times, its not consumed, then i need to start hitting it like an idiot so i don't die.

Agree on this as well. Something doesn't seem to register when striking keys with potions. I've died twice because I kept hitting the key and nothing happened so I looked down to make sure I was actually hitting the correct key and...dead.

>5. When i press skill tab, we most likely always want to see the skills we are using and leveling, so if they could be sorted by level and we could even make skills "favorite", they would be at the top of the list, that would save us a lot of scrolling.

I think it would be great if they added an additional toggle at the top that was just for ACTIVE used skills along with the other categories of Melee/Ranged/etc.

Definitely #1-4 are most annoying. I hope they address all of these.

Also, I want to add in about socketing a gem; I find you need to have the mouse cursor very top pinpointed right in the socket for it to work. Otherwise the gem and the gear just keep swapping places in your inventory.

For #1 I legit thought it was my game/FPS freezing or something to hover over the item and see what it is. Glad it's not just me.
For #3 I wish potion usage would show some kind of cooldown/charges/shaded out so we know when they are available to press.