That's just taking nerd-dom to the giddy limits
I'm currently part of (the evil bits mostly) a massive pen and paper RPG across the entire timeline of Arda and made a huge
concession by starting to read through the more pertinent of the 12 volume History of Middle Earth
so I'd have a better grasp of the bits of storyline that Tolkien didn't quite flesh out too well...
To say it's a labour of love is really pushing it - you have to be seriously anal to actually enjoy
doing that just to get little flashes of background and to say that I skim read a lot
is putting it mildly.
Tolkien's one of those writers who are big on detailed substance when it comes to genealogy and linguistics and very shady on form to help the story along. That's actually part of the appeal for most people of course as some of the story arcs are left so enigmatic as to be very open to interpretation and lets me mess around with Sauron and Morgoth as perverted genetic alchemists a whole bunch before I even get around to the far
more interesting psychopathological profiling...
But doing a family tree for every bloody character - that's definitely psycho-geek territory! Not least because Christopher Tolkien already wrote up his dad's notes more or less in one of those 12 volumes...