I would say that there are 3 or 4 sounds that I would recognise;
All are underpinned by seamless mixing and a set structure that appears as if he has the whole set thought through from the start;
Typically rolling baselines and deep grooves in the following types;
Acid influence house and uplifting groovy house from 1994 through 1998
Deep progressive - circa 1999 to 2002/3. His essential mix from 1999 and the Compiled and Mixed Bedrock typify this. Also GU Los Angeles.
Electro and Techno house. Tech house and minimalist house from 2004 onwards inparticular. Transitions and Renaissance Releases of the same name. Although some of them drift into 2 above from memory.
Vortex electro progressive house. I’m thinking latterly the Tokyo Live CD as an example example.
I would say he’s also partial to a bit of breakbeat as per Bunker 27 has large chunks.
I would also add that Digweed rarely plays too hard or fast - Essential Mix from EDC probably a rare example. He does typically find a groove and then fills the void by building and layering that sounds and then weaves in and out.
If you want a good example of this diversity Bunker 03 is IMO his finest work in a long time.