To be honest I'm not really sure, but I liked every suggestion here! If we are talking about MV, I guess I'd like more RTP tilesets with more detail tiles to add onto the default tiles, as well as new tiles entirely such as more other culture styles, suggested here a few times, and maybe some more robot charsets in default MV's RTP format. (I know the coverart characters provides two).
For MV, again, I'd also love to see what other tilesets FSM could do, seperately and too!
Again for MV, maybe RTP iconsets that show cooked meals that fit with the ingredients already there? I.e. Fish dishes for a quick example.
If we are talking about other engines, well there seem to be way more than enough tileset resources for VX & VX Ace, 2000/2003, and I'm unsure if XP really has the same amount. But probably more culture tiles are still useful for those engine resources too.
More music packs and sound packs, that are compatible for all engines, also sound nice. If we have more different cultures theme tiles, music packs and sound packs that go with them would be good.
I know I thought of a lot of other good suggestions in the survey, but I can't think of them now.