I was skeptical about the RDJ films but they won me over on viewing. They obviously knew and loved the source material, and did a great job emphasizing aspects of the character (e.g., baritsu) that's actually better suited to a visual medium than a written one. I enjoyed the steampunk elements and Easter egg nods to other adaptations like Young Sherlock Holmes.

IMO the sequel is not a good Sherlock adaptation but rather a good RDJ Sherlock sequel, because it is wholly fanficcy and fanservicey, and unapologetically so.