D is my favorite. My problem is lack of IDEs and I do not count Visual D as one of them since it requires Visual Studio which is heavy and not crossplatform.. If they could go with Visual Studio Code (when it matures) or KomodoEdit which are cross-platform and free (bias on KomodoEdit) I would be all for that.

Until then I put my bet on Mono-D and DDT.

In any case, this month is the D month for me. Enough is enough with C++ and I am thankful to them because they made an amazing replacement.