Thanks for your opinion. However my opinion is the complete opposite having owned a host of vehicles from beaters to exotics. The 6MT (IMO) defines the fun factor of the Z. The auto feel slow, sluggish, and detached, coming most recently from a GR6 DCT so it's not quite fair.
But as they say...opinions are like a$$holes............that's why they make both for the Z! Happy driving!