General impression: There are far too many festivals. Many city mayors across Europe support the Opera Festivals financially because they are good for their (cities') image, it's a bonus for tourism, it helps creating some jobs...
I want to believe that quantity implies a few quality productions every year, although this year wasn't particularly good example (except perhaps in Aix).
I believe the (main) purpose of Opera Festivals should be to propose new stuff, to define new directions in performing and staging the well known operas, and to bring to our attention good contemporary operas as well. It's hard to counter-punch that argument without questioning the artistic purpose of Opera Festivals altogether: one may as well extend the standard operatic season and include a couple of more operas in your usual Opera Houses and pretend they were success!
I am perfectly aware that matching the artistic intentions with your financial capacities is very hard, but that's what distinguishes good from mediocre Festival directors, i.e. good from mediocre festivals.
With that in mind, The Best Festival 2010 was undoubtedly the one in Aix-en-Province:
