I was hoping Barcelona to meet Benfica, then Paris vs Liverpool. 
I guess you're a Barcelona fan. Barcelona is one of the most in-form teams in Europe right now so if Liverpool and PSG meet, two teams that are equally in form, that will eliminate one of them. I believe Liverpool will knock out PSG if they meet but I don't know how they tie will be against Barcelona.
In another side, Arsenal vs Feyenoord, Intermilan vs PSV, Bayern Munich vs Madrid, and lastly, Leverkusen vs Atletico Madrid.
Madrid either meets Atletico or Leverkusen and I must say Madrid wouldn't want to meet Atletico Madrid. They are an equally stubborn team and very difficult to beat. Leverkusen may be in form and mayplay better but I belive Madrid being Madrid will come out on top.
I think that's gonna be interesting fixtures. It seems to me Arsenal will have no chance to get into the semi final following they are in the difficult line. 
Well, it's one step at a time. They will face either Feyenoord or PSV in the round of 16 and those are two teams they can win over 2 legs. Meeting big teams should be a bus stop in the champions league because if you want to win the champions league you have to win the best teams.