For details, check out the following (all details are from the Tardis Wikia site)...
Past Doctor Adventures (PDA) http://tardis.wikia.com/wiki/BBC_Past_Doctor_Adventures
(with a list of each Doctor participating)
Eighth Doctor Adventures (EDA) http://tardis.wikia.com/wiki/BBC_Eighth ... Adventures
(with list of books Compassion appeared in)
(complete biography - **contains story spoilers**
The EDA adventures were produced in long story arcs over a number of books, as opposed to misc Doctor stories with PDA. I gave up during the time D8 got stuck on Earth with amnesia (again!). They tended to get a bit repetitive IMO. Some stories were completely bat-$#!t crazy, too (Scarlet Empress and Beltempest spring to mind). Again I'll state IMO. What I liked, others will hate, vice versa. I did like the early Sam Jones stories and when Fitz turned up (but Fitz's character got screwed up with the big Faction Paradox storyline
) A number of the authors have written audio plays for Big Finish since.
The Virgin DW books weren't too bad either, although they tended to be a bit Doctor-lite, just focusing on the companions. And you probably know about Looms by now.