Seeing as nobody else has posted, I'll kick this off. My favourite collection by an absolute mile was by Burberry Prorsum. I liked the colours used in the collection, and the fit of the clothing was superb. I felt that a lot of the other collections were quite abstract indications of the type of clothing we can expect to see in A/W 2012/13, whereas the Burberry Prorsum collection gave me a really good sense of what I should be wearing later this year and into 2013. I particularly liked the following look:
GQ.com - Fashion Show - GQ.COM (UK)
The double-breasted coat with velvet collar is amazing, and the use of flat caps in their collection was something I also liked a lot.
As an aside, I think the standard of Milan fashion week was much higher than Paris fashion week. Maybe I'm not enough of a fashionista to really appreciate the looks at Paris fashion week, but I thought they were mostly quite ridiculous.