Depends on the season. In the spring, greens rule, so sometimes I'll just do a green salad with a sharp vinaigrette topped with a round of broiled goat cheese. And of course, once asparagus, beets & radishes come in, those are lovely too.
In the summer, I love corn salads, green bean-tomato, watermelon-feta, just anything to use of all the lovely produce.
When the weather gets colder I'll do roasted vegetable salads like these:
http://smittenkitchen.com/blog/2009/01/warm-butternut-squash-and-chickpea-salad/
http://well.blogs.nytimes.com/2012/11/13/thanksgiving-from-jerusalem/
I also use cooked grains and roasted veggies in salads for cold weather.
Can you tell I love salads

?