Minecraft has always got to be #1 for me, most people have played it and there is a near limitless things to do, it really is a true sandbox.
I’m torn on #2 because both games or so dear to me, but it’s a split between Kingdom Hearts 2, and Metal Gear Solid 3. I’d probably give it to KH2 just because you can also do so much to make the game either harder or more enjoyable, and Disney just adds that extra oomph to make it charming
As for 3, I’m not really sure. There are so many games I’ve had really fond memories of, between sleepovers with my neighbor and staying up all night playing Timesplitters Future Perfect on the GameCube, to Black ops 2 and all the fun I had with my online friends. As unsatisfying as it is, I think I’d have to leave 3 open