Medicine - From infant mortality rates through life expectancy, all better.
Information - I'm only in my mid-30s, but this change is immense. My kids will never get totally lost driving unless they want to do it for fun.
Technology - Already several great examples here.
Civilization - I have no fear that people from a neighboring village will show up, kill me, burn my house down, and take my wife and daughters as sex slaves. This is pretty unusual in the breadth of human existence.
Society - No one I know is property. My daughters will marry for love, not because I sold them for some goats. At our current trends, they will even be able to marry other women if that is their inclination. If they differ from societal norms, they will be able to find groups of like minded people rather than be, say for example, legally tried as witches and executed. Classes of people, divided by race, gender, or caste are not considered inferior (at least not officially, and those who argue that they are inferior are mocked or scorned for doing so).
Waste water treatment - There is not a pit of my bodily waste next to my house. It exits my neighborhood underground, goes through a variety of treatments, and is returned to the water table. My odds of dying from a disease brought on by a lack of sewage treatment is extremely low.
Agriculture and food storage - Tonight, I had a sausage, mushroom and onion pizza with tomato sauce for dinner. I bought it for $4 a few days ago, took it out of the freezer today and it was ready in about 20 minutes. The wealthiest, most powerful Pharaoh of Egypt could not have done the same (Not in the least because tomatoes are native to the Americas).
Religious tolerance - At least in the country I live in, my religious views will not get me killed.
Long story short, if I could be transported in time to any period in history to live out the rest of my life, I'd pick as close to now as possible.