There are some episodes where I'm feeling that Matt Smith is possibly the best, but then there are those where he seems like the worst. The Smith era has been the most extremely uneven era of any of the Doctors.
I think that has as much to do with the episodes as the doctor. Moffet's tenure as show runner has been almost as much of a mixed bag as Davies', although I think his highs are higher than Davies' and Davies' lows were I think (much) lower than Moffet's. But right now week-to-week you never know what you're going to get. Davies was at least consistently "meh" with occasional highs (usually Moffet-written episodes) and occasional bottomless abysses.
I didn't think i was going to like Matt Smith, but he pretty much sold me with his first episode (retarded "geronimo" aside). Amy Pond grew on me. Rory I could still do without.
As far as other doctors go, Tennet and Baker are my favorites. I seem to be the only one, but I couldn't stand Eccleston, and don't mind a bit that he left.