I have a good deal to say about Daisuke (as always) but for now, I will say that Daisuke has the distinction here of being the only character in any DRRP that I feel like I wrote well. Comparatively Sylvie and Kagami/Yakuro were a non-entity and a terrible concept (respectively) but Daisuke is one I feel I handled at least somewhat decently. He had a far clearer motivation and personality, and had a much simpler direction. He was less convoluted and thus I could focus more on creating an entertaining read as opposed to constantly fighting to justify every step he took.
I did yet again fall short with proper planning, since going into all the DRRPs I basically went in to wing it and just mostly played to survive, without really focusing on making use of the time I was given. This led me to trying to survive so I could have time to improve, which led to not having time to improve, which led to spending more time to survive, which led to not having time... And so on and so forth.
I believe I mentioned somewhere that Daisuke was originally envisioned as a Case 1 killer in a DR fic I was working on, and I had most of the major details down at that point. He was a smug jerkass with a strong competitive drive and was largely different in that early!Daisuke was much more of an active jerk as oppose to the more subdued, reclusive anti-social and slightly relateble (or what I attempted to make relatable) jerk he was for the most part. I think I'd wanted him to kill at some point, but only after he'd been through enough to make it somewhat meaningful. I wanted him to wind up with at least one relationship that might start helping him grow before axing him off, but I could have tried harder at that. Part of me thinks it would have just been better to go FULL JERK and have him play a more directly antagonistic role, as I feel I might have tried making him a sympathetic character a bit too much. Though, maybe that's just me.