I did the 23 & Me testing for DNA about 5 years ago and have done Ancestry.com research for over 5 years now. I've gone back over 500 years on my mom's side, in some of her lineage I've gone back 800 to 1,000 years. Gone back about 500 years on my dad's side, but can only get back to old Wales in the mid 1700's on his dad's side, but a lot further on his mom's side to Ireland 500 years. Found English, Scottish, French, Spanish royalty from the 1200's to 1500's on my mom's side and some Irish as well.
For me the percentages work out 53 % British & Scottish & Irish, 10 % German, 7 % French, 7 % Scandinavian ( Norwegian ) , 2 % Spanish, 1.7 % Balkan, .03 % Native American, .01 % African , .02 East Asian . That's pretty accurate with the research I've done as well.
How it's changed my life ? Well, I've been able to actually meet in person , talk on the phone, and E-mail new relatives that I never knew existed before. And they're pretty decent people ! People you would want to get to know ! And the research part is fantastic. I've always been interested in history and on the Ancestry website, millions of people all around the world have put history that you get access to use. Really cool information can be learned about relatives hundreds of years ago. It kind of brings them to life at least in your consciousness ! I totally recommend doing ancestry.com. You wont regret it. Peace out, Mr. Flipper