Well it is hard to say 5 good/bad things about the US as a whole because the US is very diverse and each of the 50 states are quite different from each other.
So I will go with the 5 best things of California which are;
*Best Climate-Usually never too hot or too cold.
*Diversity-Every type of people from all over the world, especially Silicon Valley.
*Very Green and Beautiful Landscapes-Especially Northern California including Mendocino and Nappa Counties. Whine is great too.
*Laid Back State-People are friendly and nice and there is little racism anywhere in California.
*ATMs work 24/7 and most up to date technology-California contains the computer technology capital in the world, Silicon Valley which I currently reside in.
Worst things about California;
*Public Education is very sour here (besides the top universities such as Stanford or Davis)
*Earthquakes are common and if you live in Central California you can even loose your life from it.
*Stoners are common especially in the Northern California. The famed Emerald Triangle which contains my hometown has the largest marijuana trafficking in the world.
*Random Weather especially in Mid California. Never a definite season, though that is not necessarily bad.
*The worst thing of California is the price. California is one of the most expensive states in the US. A small 1,200 sq. feet house cam cost $500,000, the same money you can use to create a 10,000 sq. feet mansion in Georgia for not much more, maybe even much less.