I got a bit involved with Ancestry etc about 10 years ago, and traced various branches of my family back to the 1600s, which was all very interesting. I must say now, I find I am far more interested in how, say, my parents lived in the 60s. Or even me, as a child, in the 70s.
A friend of mine is what I would term a bit unhealthily obsessed. It is all she does. She started about the same time as me, and we used to chat late at night as we were both delving into marriage certs etc. But her whole life is now taken up with it, and I confess to finding that a bit odd. Because at the end of the day, she's not found out much more than me, yet she will go off and try and find a specific house, or spend hours on FB speculating what her ancestor must have been doing in such a census year etc. She's done all the DNA kits and is now learning a specific language to research a specific ancestor.
(I realise I sound mean about her, I'm not, not really, but I confess to having hidden her FB feed because I don't really have any interest in her great great aunt's tombstone etc)