As I said, Atletico Madrid are really good against Real Madrid lately. Who knows... If you are looking for some surprises then Club Brugge might also be given a chance. You know how they beat up Atalanta away by 3-1 earlier. 
are you predicting that Atlético Madrid can pull up a 3:1 victory at home against real Madrid that has a more complete squad compared to the first leg fixture? even though this is football and anything can happen that can make this kind of prediction possible but with Madrid, it doesn't look like what will likely happen. it is easier for madrid to get this kind of comeback than for any other team to get a result as this against them.Honestly not trusting PSG, no way! Liverpool play much more different at Anfield. But it is your choice of course.
you see this particular second leg, anything is possible. by the standard of the first leg, you could tell that PSG where the better team and deserves to be at an advantage. but it is also possible that Liverpool had a bad outing on the first fixture and are prepared to give them a revenge performance by not just winning but also getting a good dominance of the ball. it is going to be a tough game but anyone of the team that will eventually qualify from this round definitely deserves to.