I just stumbled into this community accidentally, and am very glad to have found it. I have a single recommendation at the moment.
Title: Seto Kaiba of Pern
Genre: crossover oneshot
Summary: Fusion with Dragonriders of Pern. To his father's displeasure, Seto confronts a Bronzerider on Search.
Why it's good: extremely short oneshot that places Kaiba in the context of Anne McCaffrey's Pern. The characterization of Seto and family rings true, and this is also an excellent Pern story as well, fitting into that universe perfectly.