I've been researching my line through Family Tree DNA. They have the largest database, so you have the best chance of finding a match. I find it extremely fascinating, but I'm afraid not everyone will. I love that it is a science still in it's infancy, so new things are being discovered and you get to enjoy the excitement of it. But on the other hand it can be frustrating because you do have to wait while the science continues to develop. I've had little success with finding other branches of my tree to connect to. Most of the genetic matches I've had go back 400 years and earlier before the adoption of last names. I've found out that because I have the 159.2 gene, my family was part of the Lagin tribe of ancient Ireland 2000 years ago. My branch then jumped over to Scotland at some point. I find that fascinating, but it really is a crap shoot on what you will be able to find out. I'm obsessed with geneallogy, so it is worth it to me. You can always start with a 12 marker test and then upgrade if you want to. I've also had to really brush up on my science to to be able to wrap my mind around what all of the results mean.