The new doctor is played by Peter Capaldi. Don't know what to think of him just yet. It will be hard to follow Matt Smith, He really breathed some life into his role as the "Doctor".
I didn't like the last couple of changes at first, Christopher Ecclestan to David Tenant, and Tenant to Matt Smith. I did grow to like them both, so maybe Capaldi will grow on me as well. At least I hope so. Matt Smith really freshened up the role, making the Doctor way less serious.
I guess "time" will tell. pun intended