Well, I suppose I should maybe contribute or something, so I suppose my choices would go something like this,
1. Rogue Trader - It's Real Good. There. That's it. Though, I suppose you may be inclined to look up the Black Crusade rules, as they did a lot to balance the system honestly, such as making full-auto no longer the best choice 99% or the time, and condensing the skills quite a bit, but that's hardly required.
2. Yakuza - I really liked that old Yakuza AP you guys did, and I was really disappointed you guys didn't continue it, so I would like to see something similar.
3. Post-Apoc GURPS - Fallout was originally intended to use the GURPS system, and to the GURPS system it shall return.
Okay, I've now contributed to the forum, I hope you're happy.