At the least Matt Smith isn't the Professor (the 7th doctor, such a dick he liked being called a different name) you know those times the Doctor acts like a smart-ass and a douche, imagine that was an entire fucking Doctor in-carnate. If it wasn't for Ace I don't think I could stand to watch any of him.
I have recently been watching some old episodes, and man the old Doctors are fucking fantastic, especially the 3rd, there is great acting all around from even the minor characters. I highly suggest you watch some first season episodes though, because the 1st Doctor is so unlike any of the later regenerations, he literally gives no shits at all about humanity, the protagonists are his companions, not him, all he does is ferry them around. Instead of saving time he merely observes it, he is also a man on the run from the time lord, which at this point are the shit. That might sound odd, but man after watching the Doctor save the world 100 times, seeing him act pretty chill when humans are being sacrificed in front of him is refreshing. Hell he even teaches a man how to paralyze another man in a fight so he can win just for the possibility to get back to the Tardis.