For me it's hard to pick. While I suspect the crowd favourite is the "Fight for Paul", I think my best one was Nine days (1 and 2) with another story as a very close second. As to why, I loved the format I used in Nine days. Modesty aside, I feel that having one mentor for each girl was a stroke of genius that provided some outside perspective and spiced up the story with vague yet erotic descriptions. While the mentors were at the core of the story, the forced separation of the story in nine parts was a nice touch and allowed me to just turbo charge the story with truckloads of sexual tension.
For Nine Duels 2, I knew I had that I had to somehow follow the original yet offer something different from the first part. It was a huge challenge to divide the story in 9 parts like I did in the first story, and I regret not having been able to think of other interesting fighting scenarios for days 7 and 8. I was looking not for mere catfights, but fights were the girls fought for the "rights" a girlfriend is entitled to. I think we all agree that many a girlfriend don't like to see another woman wearing her man's oversized shirt/hoodie; so I loved the concept of Natsumi and Mayumi fighting tooth and nail for the seemingly trivial matter of wearing Seiji's shirt. Same thing with the right to shower with the guy in question. Showers feel very intimate. Not necessarily the best place to have sex, but an intimate act done by couples who have some time together.
It was lucky that I managed to amp up the ante with the concept of "pleito sin Tregua." While the first part made no bones about the girls fighting for Seiji, the second part explicitly made clear they would contest every drop of cum to the death. Moreover, the final kicker for ND2 was just before the duel where I wrote "advice" from the girls' mentor on how to fuck the other girl up in the duel room. It could have easily been a separate story own its own, but it just fit so well in the Chiemi/Kaori format. It felt very erotic and arousing, allowing to talk about feelings and vague descriptions rather than detailed actions.
I obviously regard the final catfight as one of my best, with all the good stuff I like to write about: the teasing of the man before the catfight, him watching, high heels, the frantic attempts o both girls trying to fight and make him cum at the same time, the tooth and nail fight until one girl barely overcomes her love rival.
Edit: For ND 1 and 2, a nice touch was the naming of the photos, with little throwaway lines that describe the girls' feelings about each other. It was a nice concept I don't think I'll every repeat again because I don't want it to become too repetitive. Somehow, the number "3" comes to mind, but I think ND3 is a huge stretch. There's no doubt that "ND3" would have to between Mayumi and Natsumi again. natsumi vs another girl (Or Mayumi vs another girl) won't do. That's why the duel room: The trashy bride vs the slutty maid was a nice detour but I never thought of naming it ND2. ND3 will have to be loyal to ND1 and ND2 yet avoid being "more of the same". While I can certaintly think fo 1 or 2 nice angles to tackle, I dont think I'd have enough concepts for 9 days, considering I struggled a lot to think of ideas for ND2.
As for fellow writers in the board, which of your own stories you like the best and why?
JL9000