Sorry about that Wafflecoffe, I have a very difficult time seeing shades of red, 607's color choice is worse for me, so I didn't notice your first warning. I'll give others a chance now. 🙂
Unless you're inventing a rule for my game, I think you're confusing this with Counting with Pictures. The rule for this game is What farmerguyson is doing is fine. Although it is nice to let some more different people in between associations sometimes, for more variety. Good to know! I'll also switch to green for now, then. I prefer purple, but I don't want to inconvenience people unnecessarily!
NP-completeness I wonder what my association would've been if I hadn't recently heard about the NP-completeness of a generalised version of Minesweeper. Edit: Ninja'd. I guess the next person can decide whether to continue from mine or waffle's.