Creatures - No requests here. The only thing I'd suggest is considering adding additional dynamic creatures. Yes, I realize that's rather involved. Just a thought.
Placeables - A few more rugs would be nice I guess. XD Is PHoD open to having his stuff added (particularly the visual effect stuff)?
Clothing and PC Parts - I agree with Iskadrow on Robe #200. Otherwise yeah there's plenty of clothing options. Making them available to other races, sexes, phenotypes, etc is a better goal than adding other exclusive models.
Items - Again, I agree with going for more unique models for misc items. But low priority.
Tilesets - Sure, doing some targeted improvements to the tilesets already included is nice, but I don't think you need to go out of your way on this either. It's relatively easy to add a separate tileset to a module (as opposed to adding new clothing or items which would likely conflict), and there seems to be a number of people working on independent tileset improvements. I think Project Q would benefit the community more by focusing on improvements elsewhere.
Splitting Off Overrides - No opinion.
PRC - No opinion. I have a love/hate relationship with the PRC, but it's always nice to make room to combine packs where possible.