Having owned a 335i manual also, I actually prefer the auto in the E91. It's a great gearbox. I like the option of having the choice of fully auto or being able to use the steering wheel paddles.
Personal preference though, I wasn't sure about the auto before I viewed this car. But I absolutely loved it with the auto.
For those that haven't driven the auto in these cars, I wouldn't write it off until you've tried it.