I would definitely play a home brewing or a brewing game.. whether it ran like a sims genre, where you are running a brewery, and deciding what happens and how it grows... a game style where its more first person and you do the actual brewing process, deciding what you brew, and you can collect "points" or "credits" from friends or something (since it is illegal to sell homebrew, i refrained from using "money") and the more complex, unique, or accurate to the style, the more points you get.. it can play kinda like a facebook style game, where you have friends, and they can rate it based on how the recipe reads, and how it sounds, based upon what we all know.. it could also be a way to share recipes, and get ideas, and learn, and you would use the points you collect to buy ingredients and equipment, and the higher you level, the more items you can unlock.. another option would be instead of just buying an item.. like a wort chiller or a brew stand, you can collect raw materials, and build your own, for us do-it-yourselfers.. also maybe an option to culture your own yeast, grow your own hops, fruits, vegetables, ect.. or a card (like a magic the gathering style.. definitely still love playing this every now and then, even after 15 years, or for anyone else who would admit to being a nerd, and played the harry potter card game back in the day) or a boardgame (like an online version of brewmasters) based game, where its a multiplayer-turn based game.. dunno if any of these are good ideas, but i've been thinking about a brewing game for quite a while, and would love to see one..
I may not be much of help as far as software development goes, but i would happily lend any ideas, help find information, and beta test, if anyone actually wants to attempt this!