DC/DCC

[Steamtrains]

For me, the principal attraction of DCC is performance. Once you've "tuned" your running settings, you can get engine performance that is impossible to achieve with DC. The second plus is running multiple engines at the same time without resorting to the electrical gymnastics required by DC, and much greater flexibility in this regard than is afforded by DC.
As far as sound is concerned, I tend to lean towards the "quiet" mode. Even watching videos with sound kind'a gets to me after a few minutes...