I enjoy cleaning my guns after the range. I'm not sure why, but I find it very relaxing. Plus, the corrosive crap I shoot through the Mosins has to come out quickly.
I am the same way, I think cleaning is half of the fun of shooting. Something about taking it apart and seeing all the parts and how they function is fun for me.
Haven't gotten a chance to shoot my Mosin yet, I will soon though.