heh heh heh, pretty inappropriate nickname...
anyway
the mode is emphasised by the notes that you emphasise for example.
playing in Cmaj, if your playing in D dorian and not emphasising any notes then it will sound Cmaj, emphasise the D.

Also and more importantly the chord in the backgroud is what really lights up the mode, playing D dorian over Dmin chord instead of Cmaj will be much more effective

neways hope that helps :)