I had issues DLing Italy to walk-on Saturday, which resulted in me finally getting into the arena 25 mins before starting, and therefore I didn't have time to check units or skins. Once the logs came out, I started looking at the groups and trying to sort out which skins I "needed" (and were already available), and DLed them the other night.
To me, it's just one of those little things that adds to the overall feeling of immersion. While the little details themselves don't affect much, when you get enough of them, they can. I'm primarily an MA guy, but in the spec events, it's fun to lose yourself in your little geek alterego for a bit.