Disappointed there won't be a Barca/Bayern game unless they both make the final. Chelsea's tie should be winnable for them. If they end up playing Milan... it's possible. Barca, lol no. Madrid can rack up a cricket score. Bayern will be favourites for their tie and that would mean a good attacking semi-final. In fact on that side of the draw a Bayern/Madrid semi-final could be very nice to watch indeed.
Milan have a good chance to upset Barca, but they'd need to play better than they did in the group stages. However, like Inter a couple of years ago, I think the fact they've already played them twice might help them considerably, as the 180mins of football they've recently had will be fresh in their mind and they'll know how they can improve on last time. They scored against Barca home and away they can score more again, I wouldn't write them off at all. Don't forget against us, they came out in the 2nd leg like they'd already qualified, they won't be blasse in either of these legs.
If it's a Clasico final and Madrid play like they did in the 2nd leg of the Copa Del Ray, but put their finishing boots on, they'd have a great chance of winning, however I think they'd much prefer to let someone else dump Barca out. The inability of any team to win the CL two years in a row... it's a record and records get broken, but winning the CL requires a smidgen of luck at some stage, and different teams seem to get that luck every year.