I had an 08 6speed for 3 years and now my 335is w/ dct. I don't miss the 6spd, i'd never drive an auto but DCT i can definitely live with. (This is my first automatic and i loved driving manual, even in miami traffic)
The only thing is if you decide to mod it beyond a basic tune then you will run into issues with the tranny slipping.
2015 MW/SO M4 M-DCT [CURRENT]
2011 AW/CR 335is DCT FBO [SOLD]
2008 AW/CR 335i 6MT FBO [SOLD]