David Tennant should have left dr.who at the end of the last series.?

Well we just finished watching the last series again on dvd and I think the last three eps have been my favourite so far. I think the writers will continue to make the next series even better than the last (well here's hoping). I loved it how all of the characters were involved, each of them made it so memorable. It would be great if they did a few eps where the whole gang are travelling in the tardis together.