Favorite: We have summer casual @ work & it ends at Labor Day. Instead of suits/blouses/trousers, khakis and sandals are allowed.
Least Favorite: hot & humid!
Favorite- would have to be when I do get a chance to go to the beach or a gorgeous pool and just relax for the day. It's also great just to come home to AC and be so comfortable and sleep in comfort.
Least- the long bright sunny days and the heat/humidity I hate, I love when it starts getting dark earlier. I'm a real summer scrooge at times!