Poland - Switzerland –- (Could go either way; Switzerland has a good team, but they have trouble scoring goals. Poland has better strikers, but they may a bit weaker overall. Anyway, I like both teams, so whoever wins will probably be the team I'll support in the next match.)
Croatia - Portugal –- (Portugal hasn't impressed me at all so far. Croatia, on the other hand, probably has the best generation of players since 1998.)
Wales - Northern Ireland –- (It really is a pity these two have to face eachother, since they're both teams I want to support; Wales is a lot better though and they might have a chance to get pretty far in the tournament.)
Hungary - Belgium –- (Hungary winning its group was one of the nice suprises that make these tournaments interesting. Theoretically, Belgium is the better team, but Hungary may suprise us again.)
Germany - Slovakia –- (Slovakia is good, but Germany is Germany, which means they always win even if they play poorly. It's a pity that Italy doesn't have Balotelli in its team, he stopped Germany 4 (I think?) years ago and he could do it again.)
Italy - Spain –- (Could go either way; Spain is still an amazingly skilled team, but Italy seems more stable.)
France - Ireland –- (France isn't as good as they could or should be this year, but they'll probably manage to win this one.)
Iceland - England –- (I'm really hoping Iceland will suprise us again, but normally this won't be difficult for England.)
I think Croatia, Wales and Belgium are the strongest in the first bracket and Germany, Spain and Italy in the second. So maybe a Croatia - Germany final?
Edit: Wow! Did you guys see that goal by Shaqiri? Amazing!