I love when a new achievement pops up while playing the game, but they disappear too quickly. I know you can go to the achievements tab after the game is over and search for them, but I think it would be nice if: 1- they stayed on the screen a few seconds longer 2- you could either hover over an achievement and a tool tip would show the full text of the achievement or 3- you could click on the achievement and the full achievement box would pop up on the screen. I think this would give more enjoyment to the player receiving the achievement and eliminate all the extra steps that currently have to be taken to see it in full.
Thanks for reading and I hope you consider this!