I want to hear the music flow. Not some 'SMASHEY & NICEY' type telling me how good and rare a tune is! If i want to know, i will go and look or ask. That promotes a better interaction between dj and punter.
Also, lets be honest, the sound sytems at 98% of Northern Soul events are appalling...massive hall and two tiny speakers on the stage, as if surround sound or modern equiptment didn't exist. So, the day this improves and we can actually understand what a dj is saying, maybe i will listen...unless of course they are actually saying "argh, yah, eeeeeee, trust, laootyy, me, rare,klau, doogs,arhyy bollocks!!!"