AT - for the following reasons:
1) all of the drivers with a MT that i've talked to say in traffic it's a biatch to drive a MT. I mostly use this to commute so nice to relax in a sexy car after a long day of work.
2) I don't know how to drive a manual, no one can teach me
3) maintenance cost. it's cheaper to maintain AT.
4) AT drivers on this car just have more options. If it's heavy traffic then use D, if want to make some noise then manual mode.
5) paddle shifters looks sexy