Here's where I use Dissensus to educate myself: I'm ashamed to say I don't own any J Dilla material. Tell me how/where to start appreciating his stuff as a "body of work"--I know a few songs here and there but nothing beyond them, unfortunately.
the best dilla stuff is the slum village album fantastic vol 2 (and vol 1 if you can find it) plus the j dilla welcome to detroit album on stones throw and the ruff draft album too (the new stones throw version is the one to get). is also get the tribe called quest album the love movment which is quite underrated IMO and is co produced by dilla. other than that i find him a mostly very erratic mixed bag.