My style isn't neutral. It just accepts peoples communication styles and keeps things conversational. I may have one player who really hams up the acting, another who is much more reserved and descriptive, another who talks much more casually and uses a lot of slang. But one feature of my style is I avoid artificial sounding descriptions. I try to stick to plain English, and I give my players plenty of room to interject. IN short I avoid sounding like I am reading something pre-planned. I am speaking in the moment and am reactive to what the players do. Pemerton was the one with the purely neutral play style. In my style, I just try to avoid stuff that is railroad like or feels like the GM has a story to tell, and I avoid prose like descriptions. I just talk like I always do.
In terms of speaking styles and GMs, I simply don't care how professorial a person sounds. I'd rather play with someone who talks like a biker but has a good sense of humor than someone who has a huge vocabulary and prose-like descriptions. To me, it is about do I connect with players or GMs as people. They are not there to amuse me.