Would also disagree, I've encountered many an oldschool Whovian who rates Tennant among their favourite Doctors. I like the older series just as much as the new stuff, though I do think some of the newer episodes have been overrated. The Girl In The Fireplace for instance, REALLY can't see why that was award-winning when there were IMO far better episodes in the same series like Tooth And Claw and School Reunion, in fact I'd go as far as the only episode of S2 I liked less was Fear Her.
With Tennant I always said I'd wait til he was done to rate him and his series and I will do the same with Matt Smith. Tennant does come high in the list, but I also put the massively underrated Christopher Ecclestone quite highly and think it's a shame he has recently said he wouldn't want to return to Doctor Who.