Longer daylight hours and more "eye-candy" on show.
But that is nowhere near enough compensation for the heat, stinging eyes and inabilty to breathe. Bring on winter I say!
(Disclaimner - I have hayfever and spend at least 2 months every summer unable to breathe through my nose - tried all sorts - the only remedy that worked was a drug that was banned after it was found to cause heart conditions

. Also, if is too cold, I can put on more clothes, if its too hot I can only remove so much! Plus my brain melts and I cant think properly.)
EDIT: Oh and lilies are the spawn of satan - should never NEVER be allowed indoors EVER!!