In no particular order:
1.)  Flowers in bloom
2.) Sunshine and blue skies
3.) People are overall much happier and social  
4.) Even when it's a cloudy dreary day like today, the air is still warm
5.) Cute sun dresses
6.) Open toed Birkenstocks
7.) Local produce
8.) Beltane
9.) Spontaneous trips to the mountains
10.) Beautiful sunsets at 8 o'clock that smear across the sky like a water color painting

...pure light, love, and happiness...