RootsChat.Com

After ordering mitochondrial DNA testing for myself, and for a paternal first cousin whose mt DNA would be that of my father's I learned/realized that mitochondrial DNA results are useless without a paper trail - which in my case ends with each 4x great grandmother.  I have had very interesting and helpful results and contacts re my brother's 111 marker Y-DNA, and am hoping for the same with my maternal grandfather's Y-DNA (the earliest ancestor was a French Hugenot who came to North America in the 1690s).  But most interesting and helpful has been the autosomal testing of myself and scores of cousins.  I have been able to take that maternal grandfather's ancestry back several generations further in a couple of lines, and have connected with distant cousins with whom ancestor and descendant information has been, and will be shared.  The X chromosome is inherited in a very specific pattern, and having one's X data on gedmatch allows me to see who I match.  It is easy to eliminate known cousins from x matching, because males inherit X DNA from fewer ancestors, but interesting to see which known cousins might be an X match but are not.
Testing is getting more specific (and less expensive) all the time.  I think that anyone interested in their genealogy should invest in genetic testing.  And still recommend Family Tree DNA as the best option, with their chromosome browser, etc.  However, if you have tested with either Ancestry or 23andme upload your results to gedmatch and take advantage of additional autosomal matches, and of X matches.