A couple predictions:
Bayern Munich - Arsenal
Straight forward win for Bayern, Arsenal are pretty toothless going forward with there main weapon being possesion & Bayern wil have most of that, Ribery is on fire & Arsenal defensively are pathetic with no shape to there team & no defensive cover either, often play off the cuff with no real gameplan. Bayern win Wenger out.
Valencia - PSG
I don't watch much of Valencia to be fair, but there struggling domestically but i'm not sure if they are playing well & not getting results. PSG i've watched & i do think there a god team with Thiago Motta returning, Verratti in midfield & Thiago Silva leading the defense. The Big Swede turns up, i'll give the nod to PSG.
Real Madrid - Manchester United
Both teams have played poorly all season despite United actually being top of the Premiership, i can't wait to watch this one, i expect lots of back & fourth action & goals, i think United are a constant goal threat & can score 2 or 3 out of nowhere. United win.
AC Milan - Barcelona
I think Barcelona's game suits AC Milan through the middle, the spine of Van Bommel, Nesta, Silva is gone & isn't as strong this year, but i'm pretty confident that Ambrosini & Yepes can do a good job on Messi with all that experience between the pair of them, i expect Pato/Robinho to leave in Jan so i'm not sure what the squad will be but niether are massively important in current times. I have Barcelona winning this but i don't think it's set in stone. Barcelona.
Shakhtar - Dortmund
I can't even begin to tell you how much i've been impressed of Shakhtar, in a tough group of Juventus & Chelsea (who were playing very well in the beggining) while finishing 2nd played the best by a long shot in that group, also good luck to Dortmund going to Ukraine. I'm not buying the Dortmund hype yet, fairplay for topping arguable the toughest group on paper, but Manchester City & Real Madrid have both been dire this season & if anyone impressed me in the entire group, it was actually Ajax. Close call - Shakhtar win.
Celtic - Juventus
I expect a few flicks of the hair + a couple through balls & then maybe a trip to the salon after the match for Pirlo.
Juventus win.
Can't really comment on Porto - Malaga & Schalke - Galatasaray as i don't watch any of them, although Huntelaar
if i had to take a guess probably Porto/Galatasaray.