^ I'd like to see him break Tom Baker's tenure as longest-serving Doc, especially given that he's so young.
Having said that, I was gutted when Eccleston left, but am really glad we got David Tennant, who in the end I preferred to Chris. I was also gutted when David left, but right from the moment Matt hit the screen, he's been brilliant and is now my favourite Doctor ever.
So in some ways, the rapid changeovers and short shelf-lives have worked out well. I just wonder for how long can they continue to get it so right - maybe there isn't a great replacement out there waiting to take over for Matt and we'll get another Colin Baker...