Just for fun:
Order in which I've watched Doctor Who, so far:
1. series of the 4th Doctor: in 2003 or 2004
9th Doctor: at time of first airing, 2005
3rd Doctor (all five series): early to mid 2010 (with some 1st and 2nd Doctor interspersed)
3. series of the 10th Doctor: some five or so eps watched in mid to late 2010
11th Doctor: just before Christmas 2010
1. & 2. series of the 10th Doctor: January 2011 (except for some eps watched in 2006)
2. series of the 4th Doctor: just started
I'm not exactly great at doing this chronologically... but then, the Doctor isn't good at doing things chronologically, either.
ETA: Added some stuff I'd forgotten first time around.
1. series of the 4th Doctor: in 2003 or 2004
9th Doctor: at time of first airing, 2005
3rd Doctor (all five series): early to mid 2010 (with some 1st and 2nd Doctor interspersed)
3. series of the 10th Doctor: some five or so eps watched in mid to late 2010
11th Doctor: just before Christmas 2010
1. & 2. series of the 10th Doctor: January 2011 (except for some eps watched in 2006)
2. series of the 4th Doctor: just started
I'm not exactly great at doing this chronologically... but then, the Doctor isn't good at doing things chronologically, either.
ETA: Added some stuff I'd forgotten first time around.