I'm working on finishing up some new songs right now...and I use SD to set them all up, work out what/where the accents/fills need to go, and then I try to get my drummer buddy over to lay down some live drums using the SD stuff as a guide. Of course....he's not alway available when I'm ready, so I've pushed forward on some stuff without him...meaning, I may let the SD tracks stay on one song or two, as I think they sound quite good, and I've already sorta gone beyond the drum tracks AFA recording/mixing, and I don't want to go back now to re-track drums....unless I get him to come over soon. I can also track drums with him, and then decide afterwords.
I don't want to post up just the SD drum tracks...I mean, I don't think that's going to be a good way to judge them, and until the songs are mixed, I don't much want to post any rough versions....but I will get them done soon, I hope. I've got 5 songs I'm actively working on right now....3 ready to be mixed, 1 almost, and the last is waiting for vocals and some other stuff...so there will be a few songs, and it will be interesting if you can spot which have the SD tracks.
There's really nothing special that I'm doing AFA the SD tracks. I probably spend the most time auditioning the drum samples to set up a kit I want to use, and then tweaking those sounds. The grooves....well, there's usually only a couple that will work best for a given song, I mean, AFA how I'm hearing it...so after that it's all minor little stuff. A change in the timing here, some velocity variations there...and yeah, the transitions between song sections and in/out of fills are IMO the key to getting the "human feel" thing. It's easy enough randomizing the basic kick/snare/hat grooves....but the transitions & fills have to be smooth and believable, and it's often a subliminal thing. Sometimes just a nudge of 1-2 hits makes all the difference. I just keep looping the section and making those small adjustments until I hear it working.
The hard part...or at least where a lot of the work goes...is getting the drum tracks set up without having the rest of the music tracks. I usually do drums first, and at most, I might have a single scratch track...but often I just work out the drums without anything other than what I hear in my head. I know the song, I know exactly where I want a cymbal hit, or a fill, etc....so all the drum work is done like that, and then I go and record the rest of my music track, and since I'm tracking to tape...I don't really come back to the SD drums anymore. IOW...I don't record the music tracks and then go back to the SD tracks and make more changes tweaks....so once the drums are set, they are set. I actually drop them on the tape, and then go from there.
Not that I can't sync the tape back up to the original SD tracks....but I just don't, and believe it or not, the SD tracks sound better AFTER I've dumped them to tape. I kinda expected the original SD tracks in the DAW to be "crisper", seeing how the tape might roll some of the top end off....but no, they actually sound better, more "fatter" is the best way to describe it...and the top end is still there, and easy enough to EQ some if needed. So I just roll with the tape drum tracks, which then all get dumped back into the DAW along with the music tracks, and then I do my final edits/tweaks to the whole mix.
So that's kinda my work-flow, since you asked......