Automatic is good when a terrific pickup without the loss of time, especially in racing. Now, it depends where you are using this system. Even too much of automation becomes overhead sometimes. Anyway heres my opinion:
Manual - Prefer this when you need.
Automatic - Prefer this when you need.
Hasteless, Worry free riding
Fuel consumption is not a factor at all
Mostly a novice rider/driver
Trust your vehicle more than yourself
Ganesh .R