After seeing the matchups, it is going to be really difficult for me to wait for some of them for two months. 
I mean especially the PSG - Real Madrid matchup. PSG are going to be the advantageous team in the first leg of this matchup. As I want them to advance, I hope that they can get a nice score at the end of the match. Even if they win by one goal, I believe that they would be advancing by finishing the job in the second leg.
Home away system there will be those who feel lucky and not. But for the hosts of the first leg they have to win big to make them a little comfortable. But in the PSG vs Madrid game this time I don't think they will score many goals. If one wins maybe they will win by a margin of 1 goal. Both teams are great teams, but as a Madrid fan I chose Madrid to win and qualify at the next phase. Obviously there's a winter break and player transfers. At least it will be hard to guess who will qualify. I mean especially the PSG - Real Madrid matchup. PSG are going to be the advantageous team in the first leg of this matchup. As I want them to advance, I hope that they can get a nice score at the end of the match. Even if they win by one goal, I believe that they would be advancing by finishing the job in the second leg.