Well I have to say Tirreno because Wiggins won Paris Nice and I don't like him very much
Still it's impossible not to recognize that Sky is the most well rounded team for stage races. They are really riding at a great level. If they had another leader I would be cheering for them
About Tirreno, I think it's Nibali's biggest win. Yeah he won the Vuelta but I really enjoyed the way he rode here. Kreuziguer disappointed me a bit by not trying anything on Prato di Tivo and even helping Horner keeping Nibali close.
Paris Nice was really a Vacansoleil-Sky show. Westra was a big surprise and it'll be interesting to see if he can become a one-week rider and one to go on breaks on GT mountain stages. It seems that De Ghendt is riding the Giro. I have high hopes for him on GT's based on Alpe d'Huez and Grenoble in last years TdF.