Oh man! Hard question.
I like all the seasons...
Spring for mild temperatures, renewal of the flora and fauna, getting out and starting the garden. But I hate pollen and allergies!
Summer for the long hot days and afternoon thunder boomers. Get to start picking all those veggies I started back in the spring.
Autumn for the mild temperatures again and the colors.
Winter for the long nights and the chilly weather, get to burn fires and SNOW!
I'm going to have to say summer is my favorite though because the pool is up and running and I get to snarf as many green beans, tomatos and zuccinni as fast as I can get them picked and cooked.